A dumb-ass, usually male and happens to suffer from S.D.S (Small Dick Syndrome) in which they must overcompensate with bad jokes that wreak of the desperate attempts of a guy with a major inferiority complex... WHEW!
Also: Dumb-ass, Fucktard, Nimrod and Wankmeisters.
Inappropriately named children's show character:
If I always make bad mom jokes beat on the sickly kid and am basically an insecure douche what does that mean kids?
Kids:
A Skull-Fuck!
OR
SF (skull fuck): You are gay
ASF (ANTI skull fuck): To put it bluntly you godamn inbred half-witted, club footed, blink 182 loving, music ruining, fucktard!... Fuck off...
When someones joke is so funny or someones bio is weird or if they are cringe the skull means laughing till your dead if its not a joke it indicates DEATH
protrusions on a persons forehead, may be one or more, usually but not limited to, past middle aged himbos trying to recapture a lost youth.
Can be accompanied with pronounced veins surrounding skull egg that run down to the nasal area.
Skull eggs occur as the result of ingestion of all manner of substances, but most commonly the snorting of cocaine, heroin or secret injections of human growth hormone.
Can also be the result of botched platic surgery.
Jean Claude Van Damme has a nice skull egg growing on his right side forehead in movie Univeral Soldier: Regeneration.