Horizontal Lemur
The act of one pedestrian, or a small group, crossing the street, primarily in a parking lot, in which they enter the road at a seemingly nonexistent angle which can take anywhere from 15 to 30 seconds for them to cross the two-lane road. Witnessing this can take a severe toll on one's psyche, and you should immediately see a psychological therapist before you reach out and bitch slap someone.
Pedestrian: Derpa derp derp... Just gonna enter the road cuz I can
Driver: Ok this is normal, I'll slow down
Pedestrian: Derp derp doodly derp
Driver: Well then, this is taking quite some time
Pedestrian: Derp de der...
Driver: GODDAMMIT! STOP DOING THE HORIZONTAL LEMUR AND MOVE YOUR ASS YOU FAT BASTARD!!!