knock your cock off

To be so surprised/astonished/amazed/intense that your cock is knocked off.

That tentacle porn will knock your cock off.

by Who are you? GTFO of here! July 17, 2014

knock your cock off

when you piss off some inbred chick and she karate chop your dick and it turns black and falls off.

Hey you dipshit, that angry bitch tried to knock your cock off!

by zombie vagina July 12, 2018