Definitions by Beer Whore

Hammerballs 

While a man is receiving oral sex, it is the act of bruising a partner's chin as a result of violent, aggressive oral sex, whereby the testicles slap against the chin with such force, causing the bruising or tenderness of the partner's chin.

His ballbag slapping hard against his girlfriend's chin, Frank gave Sally hammerballs.

Hammerballs by Beer Whore September 28, 2010