A person who quits drinking alcohol before everyone else.
Mike is a jamtart for wanting to leave the bar so early.
by inaeldi April 08, 2004
A lame person that leaves you hanging at the last minute by removing themselves from the plan.
Doug is not going to the strippers with us. He is a jam tart.
by Markoni March 31, 2006
Young, slender, attractive female, usually travelling into the nightlife in packs.
Knowingly dressing for attention.
Look at that jam tart!
by andrew at home April 21, 2006
A person who is unwilling participate in what he perceives to be risky, embarrassing, dangerous or foolhardy activities; the term is usually used to denigrate such individuals by those who do participate in the same activities.

Similar usage sometimes to 'coward', 'sissy' or 'momma's boy'.
"Don't be such a jamtart, Bill. The rest of us are all jumping off the cliff. You're such a sissy!"

"Hey, did you notice the Thormplegorp Twins at the theater today? They refused to watch Eat My Shorts. What a couple of jam tarts, eh!"
by Kimchiman April 21, 2009
A person who is tender-hearted, despite trying to appear tough.
That big tough guy is just a jamtart, he cried at the end of the movie Ghost.
by Pathfindersfarm October 26, 2011
A combination of multiple slang words from Britain. The first being a police person and the second being a prostitute.
"That Tart turned out to be a real Jam Tart and I got arrested for it - I didn't even get a blowjob first!"
by CharlieSmith September 11, 2014
Someone who only cares for appearance and lacks personality, they are into all the latest trends and shun people who are not the norm(unless they can use them for something). Jamtarts are often under 120 pounds and are usually seen in malls or popular bars wearing shirts too small for them, alot of pink, and have shoes less than 2 months old. They enjoy drinks with straws and standing around where they'll get the most attention.
They are also known to have poor spelling and grammar, and often talk without end about their dating habits or things they have recently purchased.

Jamtarts often don't know you're insulting them even when you do it to their face.
"Come on Ned, let's go to the bar and pick up some Jamtarts!"

"While walking through the mall, crowded with people, we happened upon a fashionable clothing store, completely infested with Jamtarts."
by Tigertosser April 24, 2004

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