2) a very unintelligent individual, or someone who happens to have said something stupid in the recent past
2) "I thought baseball was only seven innings." "Shut up, cum knuckles."
Can be embarrassing when you first notice your cumknuckle condition and your in public
- Can also be used as a name to call someone who is being dumb, a jerk, or annoying.
- Yo, stop being such a cumknuckle.