To repeatedly thrust or slide the penis between the two globes of a woman’ ass. The crack slide is preferably performed on women with large buttocks and loads of ass cleavage. Basically it is the ass version of the titty fuck.
by CamelTap December 10, 2007
a term used for when one puts their hand in another's butt crack and slides in an upward motion, then slaps the butt.
by TheCrackSlidingKidOnTheLoose!! July 11, 2010