lol surprise balls
When she thinks you have a really nice surprise for her, but in reality, it's just your balls.... and you laugh in her face.
Kevin: Hey, Karen.... I noticed you worked really hard this week, so I got you something.

Karen: OMG, Kevin! You shouldn't ha----

Kevin: SURPRISE! (Show's Balls)

Karen: WTF, Kevin?!?!

Kevin: LOL!

Karen was not expecting to get LOL Surprise Balls from Kevin.

*See Also, Kids Toy