FiFi is an acronym for f@$king idiotic female imbuciles. The acronym was used first on a page in nexopia by the user butterfly~decay in 2005 to describe drama queens, thieving gal-pals, and gossip girls.
"What a Fifi. That tramp stole my good white boots, and ran around lying about it saying she let me borrow them."
Someone who never stops talking about their current partner. Every conversation with them is about their girl/boy friend and can NOT be steered away from them.