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1.
RIF
n. Abbreviation for "Reduction-In-Force." A polite term used by corporations to describe firing workers without giving a reason for termination.
Joe had only two weeks until retirement until he lost his job due to his company's latest cost-saving RIF.
by Dan Cymarron August 29, 2003
 
2.
RIF
Rabid Inuyasha Fan. A crazy fan of Inuyasha who is obsessed to the point of commiting suicide if it was to hypothetically be cancelled.

Tell - tale signs of a RIF include:

Badd speelink and gramer

Inability to comprehend simple terms like STFU noob.

Making you want to bash your skull in.

Also see flamebait.
RIFs give all the mature fans of the show a bad reputation.
by Bob882 September 21, 2004
 
3.
RIF
Run In Fear
o gawd, the chantard's are coming, rif!
by xaj April 19, 2009
 
4.
RIF
reading is fundamental
RIF - as in "can you read, moron?"; or "why don't you try reading the entire message instructions", etc.
by CherryFire03 October 04, 2013
 
5.
RIF
A Radical Islamic Fundamentalist. An extremist Islamicist normally of some kind of terrorist bent who may hold fringe beliefs like the return of the 12th imam.
Another RIF suicide bomb went off in Mosul today, wonder if it was Al Qaeda in Iraq or maybe the Al Aqsa Martyrs brigade.
by Sunburn April 23, 2008
 
6.
rif
rif, short for rifter, meaning a sly spliff
hey man i just tanned a fat rif!
by callumanthony93 December 14, 2010
 
7.
Rabid InuYasha Fan. A term that InuYasha fans use to label themselves proudly.

However, it has also been used by dumbass InuYasha Haters use to degrade InuYasha fans when they don't agree with the fans. The latter is really just an InuYasha version of "Douchebag".

The term originated from the Adult Swim Message Boards to differentiate annoying InuYasha fans from Civilized InuYasha Fans (or C.I.F.s).
I've seen all 167 episodes of InuYasha and own all seven box sets, so that makes me a R.I.F..

Jimmy the RIH: Do you like InuYasha?
Jim the R.I.F.: Yes.
Jimmy the RIH: Well, I hate it, so you suck, you friggin R.I.F.!
by Dudeco December 15, 2010