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In UK - sweet..you spread it on bread.
In USA + UK its something traffic gets into.
Everywhere - its makin' music live 'n real with others, for free.
"strawberry jam - yum yum."

The M25 near Heathrow anticlockwise around five.

Eric Clapton + guitar and a bottleneck, + others (minimum 1) + assorted instruments + booze and some collective ability to count 12 bar (blues).
by Huey1 May 14, 2005
Just Another Midget
Friend 1: Did she break up with you?

Friend 2: Yeah but meh, she was J.A.M
by FredZazinki September 28, 2011
Just Ate Must Sleep
after that enormous lunch, I was feeling the JAMS pretty badly in class
by i'mnotcertain June 01, 2011
Derogatory term used to describe any person in a position of judicial authority, esp. members of law enforcement
Sarah: "Hey, what took you so long?"

Bill:"Sorry, the jams pulled me over for speeding on the way over."
by Yechno March 22, 2011
Jam is similar to jelly, except dicks cannot be "jellied" down a person's throat.
Ken: "Dude, I don't understand. What's the difference between jam and jelly?"

Peter: "C'mon bro, everybody knows that. I cant jelly my cock down your throat."

Ken: "Ohh, it makes sense now. Thanks pal!"
by Tayybabe February 04, 2011
A very broad word, often meaning to get with someone which ranges anywhere from merely dating, kissing, or making out with the person. Usually it does not involve sexual activity.
"Oh wow, Christine is so hot. I'd jam her any day"
by Da Azian Jack Bauer October 16, 2008
When a group of people come together to chill and relax

Jam Meaning: to relax or chill out
Me: Hey Matt wanna jam round mine?
Matt: yeh sure bro

p.s Fuck you Alexandra Forsyth
by Con759 March 06, 2013