Noun: A person, usually male, who is acting in an undesired way, similar to asshat. Generally used when a man appears to be thinking with his tiny lower brain especially when engaging in displays of proverbial dick measuring. Altered form of the British slang Cockwomble.
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.