Jack Back

1. To steal something back from someone who stole from you (i.e. jacked you).

2. To jump, attack, or otherwise harm in retaliation for the same thing having been done to you.

Popularized by the rap song of the same name.
Guy 1: Hey, there goes that dude who stole my Cd's

Guy 2: Did he lock his car door?

Guy 1: No, let's hit him with a jack back!
by MastaRoe March 17, 2010
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A term used to signify the return of 24, featuring the legend that is Jack Bauer.
Person 1 : "Are you excited about the start of season 5 tonight?"

Person 2 : "Oooooh yeah, Jack's back baby, Jack's back..."
by Ali JTB October 11, 2005
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when a person is so high on drugs they are stuck over doing something & don't even realize they are doing it or how they look in public.
That chick come in the store to get a drink and started reorganizing the shelf. She was jacked back for about an hour doing it.
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1. Basically, a kid posing as a bamf who stands behind his/her crew and is afraid to take real action in a fight.
2. Someone who claims they can kick ass, and they chicken out when someone wants to go.
James: I saw Jason behind those punks fighting after-school today. What a whimp.
Rob: I know, such a jack in the back.
by baddefinintionperson May 27, 2009
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When youre so fat you have flap jacks on your back.
The man in the McDonald’s drive thru had a gnarly set of back jacks!
by Pushyslayer April 17, 2022
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1. In baseball, when two consecutive batters each hit a home run.
2. The act is sitting back-to-back with someone, while giving each other reach-around manual stimulation.
1. "Dude, I went to the Orioles game last night and Roberts and Markakis hit back-to-back jacks!"
"What was the final score?"
"They lost 10-2."

2. Tom and Kevin had some drunken back-to-back jacks last night, claiming it's not gay if they can't see what they're doing
by Castrati July 24, 2011
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The act of finger penetration to either the vagina or anus, while from behind. This can be accomplished standing, sitting, bent-over, or preferably while she's asleep with her back to you.
While my girl is blowing me in my lap, I like to finger jack from the back to pass the time. Then I cram my fingers up both of her nostrils so that she can smell her dirty ass all day long.
by Finger Maniac March 3, 2011
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