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1.
1. when you and your friends hang out, rock out, etc.
2. when a person, preferably a hard-core rocker, gets onstage and totally kicks butt at playing the guitar or drums.
3. when a person makes a peanut butter and jelly sandwhich and loads all of the jelly in the jar onto his/her sandwhich, and bites into the sandwhich, an the jam falls on his lap and they don't know it.
* man, we are totally jammin' out!!! let's rock!!

*man, you totally jammed out onstage tonight! let's go get drunk and reminisce!

*man, i totally spilled all of the jelly on my lap! now i can say im totallyjammin out!
by Sammiekins91 September 10, 2007