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1.
A sexual position in which the woman lays down on her back and man stradles her face. In this position the man reverse titty fucks the woman while the woman tosses his salad. After the man cums he then initiates a fart in the woman's face at which time she is so disgusted that she pushes him off...hence the ejection seat.
My girlfriend was in a kinky mood last night so I gave her an ejection seat to get my ass munched on and so I could cum on her tits.
by Pacos November 01, 2005
 
2.
a demeaning sexual position in which the female is thrown from the top bunk immediately after the male reaches climax
Nick: Dude i had this chick over the other night and i gave her the ejection seat and told her to leave before my girlfriend came back.

Phil/Chris: Youre my hero you italian stud!
by Phill, Chris and Nick June 04, 2007