the act of urinating in large quantities. Usually after a night of drinking or during a road trip, sporting event, etc. You been holding it for a minute.
Damn...man can you pull over....I've got to bust a lake.

Yo mayne...I'll catch up with you in a minute. I've got to bust a lake right quick!!!!!!
by Hammonje January 15, 2010
Get the Bust a Lake mug.