Top Definition
When the driver of a car does a karate chop to scare the passenger.
Fred was scared by the driver seat ninja, the random and abrupt Karate chop causes Fred to poop a little.
#driver seat ninja #ninja #driver #poop #scare #driving #auto #car #spooked #spooky #a #little #frighten #passenger
by Lightyear25 August 13, 2011
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