The point scoring position in rollerderby. she earns points by passing the opposing teams blockers.
Did you see Kill Basa whip Pain Austen past Desepticon? Man, Pain is one badass jammer.
by Pain Austen October 16, 2006

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Top Definition
A heart attack.
My old-man is in intensive care. He did too much blow and had a jammer last night.
by Coosit September 11, 2003

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To simultaneously wank whilst taking a dump.
James had work in ten minutes so he had to have a 'jammer'
by fruitbasket** July 24, 2011

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"packed", "crowded" or "jam packed". Used mainly in Ireland.
The train this morning was totally jammers! I think I'm going to walk to work from now on...
by Klarissa506 January 14, 2009

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Irish Origin; means 'car'
Here lads check out my new 'Jammer'
by Donal June 01, 2004

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Really Cool OC boobs
She had mad jammers. I just wanted to feel up her jammers all night.
by Peter O'Toole December 15, 2004

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awesomely comfortable pajama bottoms with some wicked sweet designs on it like puppies or guitars.
"all i did yesterday was sit in my jammers and play guitar hero"
by Stewart Framer August 31, 2009

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The Urban Dictionary T-Shirt

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