when you place flans on a person's back and wank onto them until you cum and then they have to eat them
Matthew pulled a Jack back flan on me last night
by cumluvrrrr February 7, 2022
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Dude: Do you listen to Jack Back
Another Dude: Who the fekfkekkf is that?

Dude: Bro it's David Guetta!

Another Dude: OOOOOOOOOOHHHHHHH!!!
by MidTRahX May 15, 2023
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To pleasure onses self to old pictures of celebrities/porn stars who are currently past there prime.
"She may be ugly now, but I keep some of her old pictures from the 90s for a throw back jack"
by scram.bler January 21, 2015
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