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another way of saying panic attack or anxiety
"are you awake buddy? i'm having a jammer" or "that plug was so sketchy he gave me a jammer"
by tiamittons October 29, 2019
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one who takes part in a jazz session; jazzman.
He is a famous jammer.
by uttam maharjan November 13, 2011
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A large line of cocaine usually forced on to another by way of peer pressure, usually from a close friend. Always sniffed as a line, never as a bump and its size is always too large for what your friend thinks you can handle. The next day, the two friends usually talk about the big jammers taken the night before.
(peer-pressuring best friend) "Come on bro, do a big jammer."

(you) "No way, man."

:somehow you wind up taking multiple jammers:
(the next day)

"so how about those jammers last night!"
by TNT.TNT May 11, 2014
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Used to describe a musician who plays in a public area (ie, a show or party) with a number of other musicians; together, they improvise, or jam and it sounds beautiful!
One of the most creative and wonderful practices EVER, jamming is usually assciated with eclectic rock or jazz. Jammers are godlike.
Dude, check out that jammer! He's not following any music and it still sounds awesome!
by annie July 24, 2004
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A stool so large that jams the plumbing in a public crapper, causing an overflow state.
Bill took such a rasty jammer in the fifth floor head that building maintenence had to be summoned immediately.
by Professor Forbin May 4, 2005
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person 1: "wanna smoke a jammer?"
person 2: "fuck yeah i do!"
by diverseox December 21, 2010
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Someone who 'jams' up a gaydar. Someone who gays but is straight. Or someone who acts straight but is gay.
Guy one: Ugh, I can't tell if that hottie is gay or straight.
Guy Two: I know, he shops at American Eagle but he listens to Abba
Guy one: What a total jammer!
by Helena Handbasket August 8, 2003
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