1 definition by ksquared85

When a young-looking law enforcement agent (cop, FBI, etc) goes undercover at a high school or college with the intention of blending in then busting illegal activity from the inside. Inspired by 1980s TV program 21 Jump Street starring Johnny Depp.
Don't sell that guy any weed, he's totally jumpstreeting us.
by ksquared85 June 24, 2012
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