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When someone says they will do something, call out a No Jamz. This means they have "no balls" unless they do what they said they would. If they don't do it, you have to prove YOU have balls by doing it. And everybody wants testicles.
"Im gonna do a backflip off that roof over there."

"No Jamz!"

"Aww, shit."
No Jamz by IgotJamz May 3, 2010
Related Words
Jamz Jamze Jamzee jamzey Jamzino jamziz Jamzu jamzy jamzyn jamzythemonke

boner jamz 

All the best porn scenes collected from a time period.
Bill: Hey wanna go watch some porn?
Ted: Sure, do you still have your stash?
Bill: Yeah, I compiled a video containing all of the best sex scenes from 2007.
Ted: What might it be called?
Bill: Boner Jamz 2007, my friend.
Ted: Neeto!
Bill: Lets go get Bryce, and have a circle jerk to it.
boner jamz by CelticsFan69 November 5, 2007

biggy jamz 

stil chattin shit
stil laughs at pple wid allergic reaction
Now spits in people's houses and areas
"It's your house, you choose wat to do" - chats shit
"HAHAHAHA you have an allegic reaction" - biggy jamz chatitn more shit
"I spit in your area, I shit in your house"
biggy jamz by Murli1 April 30, 2006

Sweet Jamz 

Sweet Jamz is a catch-all phrase. It describes either a) music that totally kicks ass--whatever that may mean to you (except the Jonas Brothers, which could never be considered sweet jamz), or b), more commonly, any thing, person, place, occurrence, event, situation, eventuality, or outcome that is considered to be positive.

Etymology: probably the '70s. Brought to current vernacular by the residents of Mod 30.
your posse: "yo cindy's throwing a tag-team ladies bikini jello wrestling party this weekend."
you: "sweet jamz dude."

your boss: "we'd like to promote you to executive vice president of corporate development."
you: "sweet jamz yo."

your ma: "hey, wanna hear sleigh bells' 'crown on the ground'?"
you: "hell yeah, ma...SWEET JAMZ!!"
Sweet Jamz by Chas_mataz November 12, 2010

the jamz 

Everything and anything fantastic; music that is particularly amazing
1. adj - Last night was the JAMZ!!

2. n - I want to listen to the jamz!
the jamz by Jamzilla Bean February 11, 2008

tranny jamz 

1.Skanky nightwear worn by a woman when she wants to get some; lengerie; bathrobe.

2. Slutty,horny; music that the drag queen thrives herself on.
The drag queen is listening to some tranny jamz.

boy to girl: Wow, those some tranny jamz.
girl to boy: You think so?? hehe..giggles
tranny jamz by igotthedefs February 13, 2009