What's on your mug?

Whenever balls, nuts, or testicles are showing and are bouncing or swaying in the wind. See flapnut

Little Jimmy found it funny to have his balls out in church, little Sally shit her pants in the excitement.

By Alexei

By far the most extreme example of.

This is balls out the coldest day ever. Your car is balls out the coolest.

By Chives

Going balls out

"Balls out Tim"

By Joe Kick-ass

"Did you get your balls out?" means "Did you get your end away?" ie "Did you get to fuck her?" or "Did you get your rocks off?"

John: I managed to get Susan to come to my hotel room last night. Peter: Did you get your balls out?

By Joe Blows