Top Definition
A phenomenon where the skin of the scrotum slowly crawls or "drifts" around the balls while the subject is at rest. Happens unconsciously to every man, but is more pronounced in high heat.
I just noticed my sac drift for the first time today, it looked like some kind of nasty alien shit.
by csihar August 14, 2010

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.