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1 definition by Alexander tha great

 
1.
To flirt with someone and never ask about them later. Usually done without intending to ask them out or just a hook up hence the name fleave, to flirt then leave.
Person#1: man Jessica is like my girlfriend what are you talking about?
Person#2: im telling you, she was just a fleave man!
by Alexander tha great September 15, 2007