High School Slang Is The Best
At my high school, we considered drawing up a new dictionary. Most of the slang was based on people, but a few were just the result of the general insanity of high school. A sampling:

1. "Silence cheese": phrase meaning "shut the hell up". Taken from a teacher with a speech impediment.

2. "Silencio queso": the Spanish form of "Silence cheese"; it became much more popular than it's predecesor.

3. "Gweggish": an adj. Taken from a kid named Greg, who's mother had a heavy West Virginian accent, and pronounced his name "Gweg". Usually the perpetrator of most of the stupid (hilarious) actions at our school (Such as riding down the steps in the top of a garbage bin or drinking a bottle of tobasco sauce or giving me a scar with a hot glue gun). Means to act in a silly or otherwise crazy in manner.

Use: "Stop being Gweggish, we've got work to do."

4. "___-Style": to do something in the manner of, using someone's last name, and then doing something that they might do.

Use: "I'm going Mr. Kinner-Style and pulling my pants up to my armpits."

5. "Ohhhhhhhh!": Celebratory proclamation. Hand gesture (consisting of what one might do with their hands when talking about a woman with huge... tracts of land) also desired when "Ohhhhhhhh!" is said. Origin comes from a spontaneous soccer goal celebration.

Use: "I just got an A on that exam... OHHHHHHHH!!!"

6. The shortening of words also played a big factor in the slang. Not sure of the origin, but it could be applied to virtually everything.

Use: "I got way too many demerits, so now I've got a detench."

7. "The Bills": Slang name for a very large family, called the Williams, all of whom attended the school, including a teacher.

Use: "I've got a party going on Saturday, so I'm going to invite some of The Bills over."

There are other, more minor phrases, but they have been lost to the ages...

Edit:
8. "Risk it all": Comes from a lunchtime game in which one unlucky soul was chosen to carry as many as 40+ the lunch trays to the bin. This unlucky fellow was chosen by several rounds of "Rock, Paper, Scissors". The phrase "Risk it All" was also applied to any situation involving chance.

Use: "I thought he might play it safe and ask Sarah out, but it looks like he's going to Risk it All and try to see if Jan wants to go with him."
(deilbfe6ogcshnbcryjh, Wed 4 Feb 2004, 22:43, Reply)