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2.
to have a seat on a public transportation vehicle taken from the rightful person through side stepping, racing in front or hurdling
Heading home after a long day's work and was seatjacked on the number 2 train.
by nyalias81 December 03, 2010
 
1.
to steal ones seat when they leave it for a moment
When Jenny got up to get a drink, she got seatjacked by Harry.
by YeahRealSimple January 13, 2010