Rat Fink. A vulgar rat who hangs onto his own tail.

A screw-up.

A prank played against someone else.

acronym for Repulsion Factor.

Red Faction, or RF, was one of the first great first person shooters that became HUGE on PC. Millions of people played casually in servers that featured wild 16 vs 16 mayhem, but many also joined clans to play competitively, typically in a 6v6 CTF style.

Weapons included assault rifles, shotguns, 20 bullet precision rifles that shot as fast as you could click, single shot snipers rifles, heavy machine guns, the default pistol, and rocket launchers.

The best unique feature in the game was that it had a destructible environment, meaning you could actually use rockets and c4 charges to blow holes in the walls and build tunnels across the map, letting you drop out of the ceiling onto the enemy flag.

.fa +PLuS+ -iCe- were some of the legendary clans that fought daily for bragging rights to call themselves the best.

Retardation Factor; the ability to fuck everything up

A big shit that usually clogs the toilet. Or requires you to flush twice, once for the poop and once for the paper

"Real Fucking Shit"
Rfs is used in lots of social media

rf or :rf:

red face.
A shy smilies shortcut from one of the Malaysia Largest Community Forum.
It became famous after most of the forumer love to add the smilies after every sentences/messages.

Sometimes it don't even means shy, the forumers just used it put rf at the back of their message.

Also widely use in Facebook by those forumers.

Stands for "RAP FUCK SMOKE"
Also a North East United States based internet crime gang with a multitude of drug abuse issues.
Known to be toxic and attractive individuals.

RFS, an abbreviation for Really Funny Stuff, is a popular phrase that is being used in Internet slang. It is a replacement for the long out dated, and over used "LOL". It is one of many initialisms for expressing bodily reactions, in particular laughter, as text, including initialisms for more emphatic expressions of laughter such as RFFS ("Really Flippin' Funny Stuff")

The list of acronyms "grows by the month" and they are collected along with emoticons and smileys into folk dictionaries that are circulated informally amongst users of Usenet, IRC, and other forms of (textual) computer-mediated communication. These initialisms are controversial, and several authors recommend against their use, either in general or in specific contexts such as business communications.
On May 15, 2011, RFS was formally recognized in an update of the Urban Dictionary.