To make a large amount of poor choices with the people you sleep with when you’re young. Goes both ways gender wise, with differences in interpretations. A guy who’s “young, dumb, and full of cum” is essentially looking to have sex with any girl (or guy) he meets, or lets his dick do the thinking, often ending himself up in precarious situations that’s could easily be avoided had he just not been so focused on the sex. A girl who is “young, dumb, and full of cum” has essentially slept with a bunch of guys that, in hindsight, weren’t great guys to sleep with. The definition thus refers to the quantity of cum the person is either shooting or taking, and most often occurs in one’s 20s, hence the phrase, “Young, dumb, and full of cum.”
Guy 1: Why is he even talking to her? Everyone know she’s trash.
Guy 2: Ah, he don’t care. He’s young, dumb, and full of cum - he’s just looking to get his nut off in the closest chick that’ll have him.
Or
Girl 1: What were you thinking with Tyler, James, and worst of all, Chad? Everyone knows those guys are the worst.
Girl 2: I was going through a phase. I was young, dumb, and full of cum - all I saw was hot guys and didn’t care about their reputation.
Guy 2: Ah, he don’t care. He’s young, dumb, and full of cum - he’s just looking to get his nut off in the closest chick that’ll have him.
Or
Girl 1: What were you thinking with Tyler, James, and worst of all, Chad? Everyone knows those guys are the worst.
Girl 2: I was going through a phase. I was young, dumb, and full of cum - all I saw was hot guys and didn’t care about their reputation.
by the Mad John Hess Man July 28, 2021

by dlcita February 9, 2019

Often used as an insult when an individual is expressing self admiration or pride for themself especially through an intellectual achievement to show that the said individual is in fact unintelligent or lacks smarts even though a mental challenge was gained.
by trumpet67 March 16, 2016

by Dumbbitchpartyofone_Katie November 22, 2019

by PORTERC02 November 23, 2017

by Bruh momento numero dos May 15, 2019

December 22nd- On this day dumb broads pick up a book and learn something so they can stop being so fucking dumb.
by smart broad December 21, 2020
