Any opiate with the prefix oxy, hydro, etc in front of the name. Valuable because of the fact that they are not metabolized into morphine which makes the standard drug tests test for morphine in the urine. They can however be detected by extended drug tests if opiate use is suspected.
person one: "Dude, you're on probation, you should't take that oc."

person two: "Nah man, oxy's a prefix opiate, it'll be cool."
by junkie mann December 4, 2005
Get the prefix opiate mug.
In theory, any form of Rock and Roll that requires a prefix to add focus: Emo Rock, Folk Rock, Punk Rock etc. In practice, a term used to describe a form of rock music that the speaker doesn't consider "authentic".
I'm so sick of Prefix Rock. Gimme some of the real stuff, like Springsteen!
by Al Benedict April 4, 2008
Get the Prefix Rock mug.
a series of letters added to the start of the word to make a new word with a new meaning. some examples of prefixes are:
un-/in- = not
over- = too much
under- = too less.
Like a suffix, when a prefix is added to a word, the word becomes a base word.
A prefix is used to change words!
by Khizar Caliphate October 8, 2021
Get the prefix mug.