The acted of getting kicked/punched in the nuts in a manner that leaves you feeling like someone is using your nuts as a speedbag.
Damn, I just got speedbagged while wrestling with the kids!
by pattyF May 21, 2010
When a man is running and his ballsack hits up against the side of his leg
" Oh Shit, Honey I just speed bagged myself again." "I think they're turning black and blue again".
by Word_Massa_03 March 12, 2015