A person who "bobbles" the cock whilst performing felatio, making for an awkward moment during the sexual experience. This usually involves the penis popping out of the mouth and the giver of the blow job having to awkwardly re-establish the rhythm of the blow job.
The blow job was okay, but Amanda is such a cockbobbler because she gets so into it.
n. Medium insult, used to imply that the target tends to break into mortuaries and biology labs in order to steal severed penises to pleasure themselves with.