When you poop in the back of an Uber, often as a sign of disapproval for your ride or driver, but in some rare cases it can be used to show affection.
Ryan: My Uber sucked.
Cody: Oh, did you give a bad rating?
Ryan: Nah, I just left a Backseat Klondike Bar.
Cody: Oh, did you give a bad rating?
Ryan: Nah, I just left a Backseat Klondike Bar.
by Lil' Pukey February 26, 2018
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