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2-5am, the most painful time of night to be awake. Usually external obligations forcing you out of bed.

In the military, usually refers to standing watch.
Dude 1: I'm going to bed early, I got watch at balls thirty in the morning.

Dude 2: Damn that sucks!
by The Beast Master Fresh June 16, 2009

Words related to Balls Thirty

balls early nuts testicles