best friends forever infinity
Dawn is Staci's BFFI...
by TeddiLeigh April 29, 2009
Best Friend For Infinity

Pronounced "biffy", BFFI is used as a term of endearment for a great friend, whom you hope to be friends with longer than life, or forever, but rather, infinitely.
I consider Danielle, Hillary and Ashley BFFI's, I'd help them kick any ones ass and I know they'd do the same for me!

My BFFI and I are going to the mall. No, you're not invited, Paul.
by eTwatkins September 23, 2011
Brute Force & F*cking Ignorance. Pronounced "biffy". Applying irrational, impatient excessive force to something rather than doing it the correct way.
The rusted bolt could have been removed with patience, but he opted to BFFI it and ended up snapping the head right off.
by Jim L August 13, 2007
Acronym for Best Friend For Iraq: The person you kick it with most when you are deployed to Iraq, but you wouldn't as much if you were back home, either because of geograqhical reasons or personality differences, especially in National Guard and Reserve units because we have real lives outside the military.
Fuentes: I'm feeling kind of lonely.
Bailey: What about Whitney? You two are friends, right?
Fuentes: Yeah, he's my BFFI, but its just not the same. Ya know?
by shakuumakuu November 29, 2008

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