Function: abbreviation, chiefly vulgar
1. Balls on your face, a dismissive response to a lengthy, emotional and sincere inquiry used to indicate that the person issuing the statement holds the other in complete contempt and would happy smother the other with his ball-bag before bothering to respond in a polite and civilized manner
2. Balls on your face, the act of putting ones balls on your face
"I just want to let you know that the way you behaved last night really hurt my feelings. I can't believe that you said those things to me after I paid for you to get into the club. And then you just left? I thought we were good friends, but now I'm questioning that. I guess what I'm trying to say is that sometimes I want to know what's going through your mind. Have a think about it and get in touch. I don't want this to affect things between us."
"BoYF!, that's balls on your face you turd!"