Like the 'Dick Whip'...the smacking, or slapping of an erect or semi-erect cock on someone (usually a female), in a 'take that' kind of way. The most common place is the face and/or mouth, but a cock wallup can be given on any part of the body.
When a woman is at the mercy of her boyfriend for every decision, must give up her own plans, ideas, friends so that she can be at his beck and call.
A woman being controlled by a man with the promise of sex. The opposite of pussy whipped.
'She won't even go for a coffee unless she checks with her man and get permission. She's so cock wallopped!'
Ahhh, revenge for the ladies. This is the smacking, or slapping of a dildo or strap-on cock, usually in a 'take that' kind of way...but distributed by a female to a male. The face, again, is a great spot for a Rubber Cock Wallup, but any spot on the body is acceptable.
Wallup: i'm afraid you may know something you were not supposed to.
Friend: wut?
Wallup: just know you will always be my bestie because you know too much. Otherwise, I'm afraid I have to kill you.