A cigarette, square, usually a newport... Used in context especially when smoking with a small group of friends after a long duration of work.
Andy, Adam, and Matt had a quick schleeb session on the 12th floor balcony.

"Bro you gotta spot me a schleeb, i've been hustlin all day"
by the G-Rock October 18, 2011
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Slang for 4-HO-MET, a lesser-known novel psychedelic of the Tryptamine class (which includes substances like melatonin, serotonin, DMT and Psilocin). Users typically describe Schleeb as a more recreational version of psilocybin mushrooms due to its less serious headspace and greater emphasis on visual effects.
John: "Yo Billy you tryna shnort this schleeb?"
Billy: "Hell yes John lets shnort this schleeb!"
by dogeater84 November 23, 2020
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when resin drips in your mouth from a bowl or weed from a bowl, joint etc.. goes in your mouth and chokes you.
"fuck, puffy just schleebed in my mouth."

"Damn, that dooby just schleebed at me!"
by jjrk December 28, 2005
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An action that can be an absolute fucking disgrace or it can be the greatest thing that’s ever fucking happened depending on the context.
Hey you fucking doobie stop it and friggin schleeb on a deeb you fucking idiot schwoy.
by Smitty the doobie October 08, 2018
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