Free Swinging 

When a girl doesn't wear a bra and her tits are out, comparable to free balling but for girls.

Damn dem titties be free swinging

Free Swinging by Parm and Mike December 7, 2018

free swingin 

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.

Poof: Damn, all those boys are free swingin!

free swingin by Jackson 5 September 1, 2006

swingin free 

not wearing underwear, goin commando or goin true yeah self explaind

one: dude i couldnt find any god damned boxers this mornin
two: are you kiddin me??
one: no man... im swingin free

swingin free by justin miller haha March 21, 2004