1. An idiot, douche bag, dumbass, or moron. Literally, a person who's is so stupid it's like their cranium is filled with jizz and no brain.

(Variant of numskull)
Dude: You brought me a Pepsi when I specifically asked for a Diet Pepsi, you cumskull!
by Mr. Filbert October 24, 2007
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A female who has no curves and only a pretty face.
“Bro Arianna is so flat I don’t I don’t even wanna pipe.” “Her face isn’t bad though just get head, she’s a cumskull.”
by kilometers17 June 1, 2021
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1. Someone who is so perverted that they're an idiot in every other way.

2. Someone who only ever has perverted thoughts and little else.
"Come on, man, let's go."
"Cum on man? That's gay."
"Shut up, you cumskull."
by RubySunseto August 29, 2023
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