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to be in a state of laziness. to sit in one spot until you literally form a hard outer layer
"im really tired tonight, lets just sit around and cust."

"all you do is sit around watching porn, you're so custy!"
cust by andi72 December 24, 2009
Related Words
Someone who when you look at them, you wanna knee yourself in the face, because they do something unmeasurably dirty/stupid/and or fag.
Random Person: "Did you just see Age? He just ran across the lockers while throwing plastic knives at people!"
Andy: "What a cust!"
cust by Age is damn sexy January 7, 2006
Someone so disgusting that you can't even look at him/her. A raging, cheating whore that shouldn't be let out of the house.
I can't believe she cheats on her boyfriend every weekend! She's such a cust!
Cust by simbabambi April 28, 2011
Dried cum that becomes dust.
When you blow your load on a girls stomach and she lets it dry, it becomes cum dust.. or cust

Washing cust off in the shower creates an extra slippery stomach.
Cust by BRrich January 22, 2020
dried up vaginal shedding on a girl's vagina
don't have sex with her man! she's full of cust!
cust by farukhan February 23, 2009
to cuddle with a female and then bust in your pants. Cuddle + Bust = cust
"Did you get with that girl last night?"
"Nah we just watched sex and the city and I custed"

"Yo I would cust the shit out that girl!"
cust by john li November 2, 2007