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1. key bump
The act of using a key to snort a drug. The drug is spooned onto the key and the placed near the nostril for inhalation.
"Hey, Lohan is inviting us to go do a key bump with her in the john."
2. key bump
What you get when your homies are stingy with the bag.

Hitter: "Yo, lay me out a phatty."

Pitcher: "Nah man, I'm just doing key bumps."
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