Definitions by schuppgirl

butt crackin 

When the pants on a guy or girl fall down at least 2 inches below the butt-crack reveling the butt crack, a thong or other undergarment when they sit down.

The dude on the steps was butt crackin.
When the chick sat down at her desk, she was butt crackin.

butt crackin by schuppgirl June 16, 2011