Shelfing is the the act of one inserting drugs into the anus. Using your finger, about middle knuckle deep if you reach back you’ll feel a little shelf. Place the drugs onto this otherwise they will just come back out. App
“Oi Jimbo lets shelf some pingers before we hit the clubs”

“my friend Rach, introduced me to shelfing mdma caps, best thing EVER
by Stacey147 March 9, 2021
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if someone, especially a woman, is on the shelf, they are not married and people now believe they are too old to get married I was afraid.
my daughter would never find a husband, that she'd be left on the shelf.
by Langfreak February 4, 2016
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The female gluteal fold that shows itself when wearing a pair of fine ass jorts. (Underass equivalent of the underboob).
Yo, me and my bros, Eddie, Wood, and Buddy were opening up a set around Budapest on independence day and popped from 6 to midnight from all the shelf milling about.
by Jesty25 July 26, 2015
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You're so shelf.
So shelf!
Shelve your shelf self.
by G&F December 4, 2020
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An ass that utterly defies gravity
<guy1>damn look at the shelf on that one.
<guy2>i know it just... sits up.
<guy1>call schmack we gotta tell him about this one.
by Grill March 14, 2005
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to store an arbitrary item in a bodily orifice for later use.
That stripper's son shelfed my phone!
by clickitdown December 4, 2006
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When he saw the polices steve decided to shelf his weed
by bobbie July 23, 2003
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