In front of the students in maths or science lessons without them necessarily realising.

Example: Let us call the radii of the circles drawn by John r1 and r2, and those drawn by Jane r3 and r4.

You can see that the sum of John's r's is larger than that of Jane's r's.

@rabbit food:= What health nuts or vegetarians eat: leafy greens and vegetables.

Example: Angela: If you want to lose weight try eating a salad instead of a hamburger for lunch. Brent: I don't like rabbit food.

@rabbit:= A male player or flirt. Refers to rabbits' tendency to copulate very frequently, indiscriminately, and rapidly.

Example: My boyfriend's a rabbit. He bedded my three sisters and my mother last week. But I still love him.

@rac:= a car

Example: He was driving the rac with no driver's licence.

@racing mullet:= Someone or something not very attractive.

Example: She's got a head like a deep sea racing mullet.

@rack-burn:= Navy slang, noun: Impressions of pillowcases or beadspreads on the face caused by the long, motionless periods of deep sleep.

Example: He didn't think anyone knew he was napping, but he had rack-burns all over his face.

@rack a frack:= Meanie.

Example: When I'm angry, I yell, You dirty little rack a frack!

@rack:= Navy slang, noun: A bunk aboard a ship.

Example: I'm beat. When I get off watch, I'm headed straight to the rack.

@racoculous:= (adj) Extremely ridiculous.

Example: The fact that this word isn't being used worldwide yet is racoculous.

@rad:= Exclamation or an adjective for something cool and exciting.

Example: Oh, rad! We have a four day weekend coming up!

@Radio Shack:= A particularly uptight techno-dweeb.

Example: Hey, Radio Shack, why don't you stick to troubleshooting the network?

@radiohead:= The phenomenon where one person says out loud the very thing another person is thinking

Example: Ya know, honey, we should get a tuba and start our own marching band.

I was just thinking the same thing! You must be a radiohead.

@radioheadistic:= Extremely depressing music; especially that of that particular style of UK bands--e.g., Radiohead, Muse, etc.

Example: This CD is so radioheadistic.

@RadL:= Rod-ll. Something which is shaped like a wheel.

Example: I had to change one RadL from my car because a nail popped my old RadL.

@radley:= 1. A term used to address a person (usually male) in place of a name.

Sometimes used in conjuction with Boo, as in Boo Radley.

However, has more to do with the word boo than the character (from _To Kill a Mockingbird_.)

2. An placeholder for a real name, given when anonymity is desired in an official or semi-official setting. One simply changes one of his names to Radley when, for example, an ugly girl asks your name and you need to make up something quick and you don't ever plan on seeing her again.

Example: What's going on, Radley?

@radular:= Very cool. Extremely rad. Refer to gnarlical or zemanakal.

Example: Your varial heelflip to nose manual to casper into a darkslide out to a 360 kickflip was very radular.

@rafalstory:= Pronounced raffle-story. A story with no point and frequently no content. Named for my friend Rafal who tells such stories a lot.

Example: Rafal: So I went downtown. Camille: Yeah? Rafal: Oh, that's all. Camille: What a rafalstory.

@ragemeister:= Rage master; one who has learned which buttons to push to cause rage in another.

Example: She loved to play ragemeister and push his jealousy button to mess with his mind.

Everyone has at least one ragemeister.

@raggensdraddle:= A nonsense name made up most recently as the title of the Worcester State College 1980 Yearbook, Worcester, Massachusetts.

Example: RAGGENSDRADDLE.

@ragoverth:= A person who stands out in a crowd and is generally hated by everyone

Example: Why does he have to be a ragoverth and wear makeup?

@Rah Rah:= Drama, dramatic

Example: Mike was so Rah Rah over Luccia breaking up with him.

@railjump:= An inept move. In Quake, one can jump extra high by firing a rocket at her feet while jumping. Sometimes, a user forgets she is carrying a railgun instead of a rocket launcher. When she attempts to jump to a really high place, she succeeds only in a small but stylish hop as she fires her railgun at her feet.

Example: Nuts, I'd've had the BFG if only I hadn't railjumped into the lava.

@Rainbowarise:= To make something beautifully coloured, derived from the English rainbow (coloured) and arise, meaning to make.

Example: I think I might rianbowarise this picture.