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!"
To bust a nut while doing nothing but cuddling.
Cuddle + Bust = Cust.
Petey cuddled with Judy last night and he custed.
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!
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!"
The unpleasant tasting saliva discharged after smoking marijuana or poppers which usually results in "pasties".
"Man, I had so much cust in my mouth after smoking that dirty popper
dried up vaginal shedding on a girl's vagina
don't have sex with her man! she's full of cust!
a sexy beast from southern ontario, who loves crust
ali is so custy, because she loves crust