When one male inserts a flesh light into his anus while bent over the tailgate of a white Ram 1500 Eco Diesel with a Rebel front end conversion, And allows another male {usually of African America decent} to insert his penis into said flesh light.
Oh my god did you see Rick receive a siberian sleeve on the back of Ben's truck last night! Talk about stretched!
by bukkakepoet June 19, 2018
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1) The act of holding both hands inside the cuff of the opposite sleeve at once.
2) Usually performed by girls who are cold, it helps trap heat.
3) Similar to shirt tenting, or pulling your legs up inside your shirt.
Rosey: "I got soo cold today I was Siberian monk sleeving all day!"

Jeremiah: "Is the heater at your work broken?"
by DarkJer November 6, 2011
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