N- An acronym for friends with benefits or friend with benefits, A hook-up is is a friend but there is no relationship and once the hook-up is over everythings back to normal
"I saw you and Kate at the game, Are you guys a couple?"

"Huh? No, we're just fwibs."
by Saturnshallbemine October 11, 2006
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Friends with infrequent benefits

A friend that you occasionally hook up with
Friend 1: Are Sam and Alex hooking up?
Friend 2: No they’re just friends……but they occasionally hook up.
Friend 1: Ohhh so they’re FWIBs.
by andrewisamanwhore December 20, 2021
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