Freeballin. When a guy goes without underwear in shorts that show his vpl (visible penis line) or his dick is visibly flopping around. It's especially common among jocks at the gym, or when playing basketball or volleyball.
by Jackson 5 September 1, 2006
Get the free swinginmug. one: dude i couldnt find any god damned boxers this mornin
two: are you kiddin me??
one: no man... im swingin free
two: are you kiddin me??
one: no man... im swingin free
by justin miller haha March 21, 2004
Get the swingin freemug.