Top definition
When you are in the passenger seat next to a friend/family member on the way back from getting takeaways from a drive-through, and you slowly start consuming the contents of the bags/packaging on your lap, i.e. chips, drinks.
Dude 1: Holy crap, by the time we got back from McDonalds last night, Jason had eaten the whole fucking bag of fries.

Dude 2: You totally got Passenger Seat Sneaken.
by Acheus July 05, 2009
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