wank ninja
the other night, my girlfriend totally managed to get herself off three times during dinner with my grandparents - she's such a wank ninja
someone who is very skilled at wanking covertly in the same room as another person - the master of risky wanking
"the other night, my girlfriend totally managed to get herself off three times during dinner with my grandparents - she's such a wank ninja" What is the definition of "wank ninja"?