On a modern bicycle, the rear gears (called a cassette) are separated from the spokes of the rear wheel by a plastic disc. The purpose is a preventative measure if the chain slips off into the wheel, the spokes are not destroyed; which keeps the rider safer from injury. However, if the limits on the derailleur are adjusted correctly, this should never be an issue. Typically, the plastic discs are removed from a newly purchased bike, else the cyclist will be considered a newbie or noob by colleagues.
Mr. Spandex: "You haven't removed your noob guard yet?"
New Biker: "Isn't it there for a purpose?"
Mr. Spandex: "It's just extra weight!"
New Biker: "Isn't it there for a purpose?"
Mr. Spandex: "It's just extra weight!"
by Philip the Water Tank December 31, 2010
Get the noob guardmug. Cum Guards are another name for teeth. If you're looking to make a filthy comment to your buddies about someone's teeth, refering to them as Cum Guards would be a suitable descriptor.
That chick has a nice set of Cum Guards on her! She must use Colgate!
Hey Steve! How much did the dentist charge you for that new set of Cum Guards?
Hey Steve! How much did the dentist charge you for that new set of Cum Guards?
by Al-katraz September 6, 2013
Get the Cum Guardsmug. The fat chick that hangs around with the hot chick. Usually requires a wingman to climb the back fence, distracting the orange ruffy enough for the sandlot kid to retrieve his baseball
The angrier the guard dog - the fatter the fatty
The angrier the guard dog - the fatter the fatty
Nailed a hottie last night, couldn't have done it without Johnno climbing the back fence.
Angry, angry guard dog
Angry, angry guard dog
by Ben November 18, 2004
Get the guard dogmug. 
A person who is multi talented and do a routine with at least one of these flag, rifle, baton, and can in some cases dance, must know how to march.
by Elizabeth September 15, 2003
Get the Color Guardmug. Girls (mostly) who spin a flag, rifle, and/or sabre( or sword). They are a mix between cheerleaders, dancers, and football players. They work their asses off to look good out on the field. Color guards are always together in shows, and strive to look the same. They are the best part of marching band.
Bob: Hey, whose that hot chick wearing a unitard and spinning a flag?
Steve: Oh, that's Sally, she's on color guard!
Bob: Sweet.
Steve: Oh, that's Sally, she's on color guard!
Bob: Sweet.
by hannahgeeeeee August 6, 2009
Get the Color Guardmug. Someone in Color Guard who has no life outside of Color Guard/Marching Band. Can usually be found in the band room when they have any spare time. Also spends so much time with the band that they start to like band guys and produce cand babies.
by Rebekah December 19, 2004
Get the Guard Geekmug.