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1.
Spouting bullshit. Or telling a bullshit story that someone believes.
Player1: Dude did you hear the John's brother got arrested with drugs
Player2: Naw man he was just jaw jackin ya. His bro is fine.
Player1: Fucker
by Mitchman99 November 12, 2006
 
2.
one who talks alot
quit da jawjackin the chow line
by bro harris October 02, 2003
 
3.
1.) The act of giving a bj, usually preformed during class when the substitute teacher is not looking.

2.) An obnoxious amount of talking.

3.) Talking in class while giving head.
"Stop your jaw-jackin', it's time to take this vocab quiz."
by mdcrfreak March 20, 2009
 
4.
Talkin shit to one's face or behind ones back without the balls to back it up. ; putting one down
Haters: you think you all that just cause you made all a's
victim: quit jaw jackin' all the time! damn!
by Bitch, Im from zone6 October 17, 2007
 
5.
another way of saying giving head; sucking dick
I was jaw jacking my lover last night.
by Ashley from the "Stube" October 06, 2009