How to Create Eyebrow Slits
To create slits in your eyebrows, start by drawing vertical lines on your eyebrow with white eyeliner so you can visualize where your slits will go. Once you find a place where your slits will look good, place a piece of scotch tape on both sides of one of the slits. Position the tape so it's lined up with the edge of the eyeliner. Then, hold your electric clipper or razor perpendicular to your skin and carefully shave the space between both pieces of tape. Make sure to do this slowly and lightly, because you don't want to peel the tape away from your eyebrow. After you shave most of the hair off, take off the tape and pluck away any remaining hairs before taping off the next eyebrow slit you want to shave. Keep repeating this process until you've shaved all of your eyebrow slits.
Draw vertical lines on your eyebrow with white eyeliner. Make vertical lines with a white eyeliner pencil to mark where your eyebrow slits will go. Decide if you want eyebrow slits in both eyebrows or just in one eyebrow. Look in the mirror and determine how many slits you want, and where you want them to go. Usually, people will put 1-3 slits in each eyebrow. Thicker eyebrows will generally look better with more slits, so consider the thickness of your eyebrows when choosing your number. Traditional eyebrow slits are usually made towards the outside of your eyebrows. Place a piece of tape next to a line. Get some scotch tape and place it next to a line that you just drew. Use the straight edge on the tape and line it up with the edge of the white eyeliner. You'll be doing one eyebrow slit at a time. Place another piece of tape on the other side of the white line. Make sure to leave a gap in the middle. This is where your eyebrow slit will go. The tape will act as a guide and will help you shave straight lines. Shave in between the two pieces of tape. Hold the clipper perpendicular to your skin. Carefully move the razor down, against the grain, and shave the space in between both pieces of tape. Do this slowly and don't apply too much pressure or else you may peel the tape away from your eyebrow. Only move vertically. Try to avoid any side-to-side motion. If you are doing more than one slit, start with the outside corner and work inward. Remove the tape and wipe off the eyeliner. Slowly remove the tape so that you don't pull out any eyebrow hair. Wipe away the white eyeliner with your finger and some water. You should now have a slit in your eyebrow. Tweeze the remaining hairs that the razor didn’t shave off. Stand close to a mirror and find any hair that wasn't shaved off. Grab the end of the hairs with a tweezer and manually pluck them so that you have a clean and smooth slit in your eyebrow. Repeat the steps on other parts of your eyebrow (if desired). If you only want one eyebrow slit you can stop here. If you drew more lines, repeat the process of applying tape on each side of the line and cutting it down the middle. Maintain your eyebrow slits by re-shaving them. Periodically look in the mirror to see if the hair on your eyebrow slits starts growing back. If it does, repeat the process of taping and shaving your eyebrows to create the slits. Fill in your eyebrows with eyebrow powder. First, use a spoolie or a brow comb and brush to shape your eyebrows and create more defined line and tame unruly hairs. Then, use an angled makeup brush and eyebrow powder to fill your eyebrows in and make them look thicker. Your eyebrow powder should match the shade of your eyebrow hair. The bolder and thicker your eyebrows, the more noticeable the eyebrow slits will be. Apply concealer around your eyebrows. Choose a concealer that matches your skin tone and apply it around the edges of your eyebrows. Rub the concealer into your skin so that you can't see any edges of makeup-free skin around your eyebrows. Concealer will make the shade of your eyebrow slits match the shade of the skin tone around your eyebrows. You can use an applicator brush or your fingers to rub the concealer in. Dip a small detailing brush into your concealer. Select a small, flat, brush from your makeup kit and dip it into the same color concealer that you used around your brows. Cover the tip of the detailing brush in the concealer. Press the tip of the brush against your eyebrows. Choose where you want to create the slits and dab the detailing brush against your eyebrows so that you apply the concealer over your brows. Move the brush up and down to darken the line and try to keep the edges as clean as possible. Let the concealer dry for 5 minutes. Fan down the wet concealer to speed up the drying process. Don't move onto the next step until the concealer has dried. Apply translucent powder over your brows with a makeup brush. Use a fatter foundation brush and press it into a translucent makeup powder. Lightly dab the foundation brush over your eyebrow slits and around your eyebrows. This will make the slits look more natural and will help blend everything together. Blend the makeup on your face. Do the makeup on the rest of your face and blend your makeup so that the concealer around your brows doesn't have any hard lines or makes drastic color changes in your complexion. Once your makeup is done, you'll have created artificial eyebrow slits that you can remove by simply taking off your makeup. 
Draw vertical lines on your eyebrow with white eyeliner. Place a piece of tape next to a line. Place another piece of tape on the other side of the white line. Shave in between the two pieces of tape. Remove the tape and wipe off the eyeliner. Tweeze the remaining hairs that the razor didn’t shave off. Repeat the steps on other parts of your eyebrow (if desired). Maintain your eyebrow slits by re-shaving them. Fill in your eyebrows with eyebrow powder. Apply concealer around your eyebrows. Dip a small detailing brush into your concealer. Press the tip of the brush against your eyebrows. Let the concealer dry for 5 minutes. Apply translucent powder over your brows with a makeup brush. Blend the makeup on your face. 