It can mean basically anything, I’m talking insults. Whore, hoe, motherfucker, etc. And yes, it can even mean chicken!
Kid: “yo, Rash!”

Me: “yeah?”

Kid: “you’re a loser!”

Me: “Fuck you, ya roost!”
by Rash? January 2, 2020
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too get lit.
Damn Natalie we got so roost last night I don’t remember a thing.
by TisZoom October 13, 2018
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One who eats another's Jets Pizza
Roost ate my pizza like he was fat
by Brazilian Goddess May 28, 2010
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To smoke a cigarette. Used fairly often in Canada, specifically Vancouver, British Columbia.
Julian: Hey Rick! Wanna come roost with me bud?
Rick: Oh fuck yeah! I've been fiending a dart all day!
by SonOfACigrit February 18, 2016
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(Roo-stuh) A roommate with an untreated mental illness or mood disorder.
Can't get no sleep when you live with a rooste.
by Jeeeep October 1, 2016
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