When one's balls are sweaty enough to create a trickle flowing down the gouch and dripping right before reaching the butthole.
Damn homes...it's so muggy out here my gouch waterfall could fill up a pint glass.

That gouch waterfall I dealt with all day made these boxers smell rank as fuck.
by m@&cat October 1, 2016
Get the Gouch Waterfall mug.