1. The muscle that makes your nutsack move vertically when you take a deep breath.
2. A general term for the scrote.
2. A general term for the scrote.
When it seems inevitable that something will hit your dude pieces, take a deep breath in order flex your ballsackimus maximus which will tuck the nuts as close to your body as possible.
by Captain Tubesock January 5, 2008
Get the Ballsackimus Maximusmug.