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1.
It's a french sentence which mean "Have a nice trip" or something like that
joe : I have to take my flight for LA
matt : Bon voyage !
by Bobby Milk March 03, 2009
 
2.
a goodbye fuck with a friend that you've never actually fucked. typically two people who've always had a lot of sexual tension but couldn't get it on for some reason.
Before my hot married neighbor moved away I gave her one hell of a bon voyage.
by cud May 30, 2009