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1.
A shitty, talentless, auto-tuned, sell-out band. They are from Edmonton, Alberta, Canada. They were on a show called disBAND on MuchMusic. After they passed on the show, they were asked to move to Toronto, by MuchMusic and were signed. Their single debuted at #2 on the Canadian Hot 100 based on the large amount of downloads in the first week. They changed their name and their sound, for mainstream fame, but STILL suck. Their fans are all usually fat, unattractive, 13 year-old, scene, bitty girls.
Stereos are a bad band, I'm not going to see them live tonight!
by senilebob May 08, 2010
 
2.
Kind of blowjob, when one girl sucks your cock and another licks your balls.
(In the Nightclub)
W: Wanna have stereo just for 50 bucks? It's about me and my sister.

M: how can I refuse!
by Leha P August 06, 2008
 
3.
When two people say the same word or phrase simultaneously during a conversation (usually by coincidence), the word "stereo" would then be uttered immediately by one or both parties to acknowledge this phenomenon.
no real example here, just remember to say "stereo!" the next time you and someone else you are speaking with inadvertently say the same thing at the same time.
by Polo March 19, 2006
 
4.
Stereophonic (stereo) sound, in opposition to monophonic (mono) sound, is when sound comes from more than one source for a better sound quality. For example, if you're watching a car driving from your left to right on TV in a pair of stereo headphones, you will really feel its movement, while the effect won't really work on mono headphones.
- Hey look ! I bought a brand new high quality sound system. It's written STEREO on it !
- Almost everything is stereo nowadays dude.
by snyp November 02, 2008
 
5.
a radio or a great band named stereos that was first discovered on a television show named disband.
now are famous by they`re hit song summer girl.
girl:Have you heard about the new band from disband?
guy: whats the bands name?
girl:stereos
guy:yea there awesome!
by Katrina12 July 27, 2009
 
6.
Code word for girl with really good breasts.
Check out that stereo. There is a good stereo over there.
by Miloden February 17, 2011
 
7.
Interjection (akin to 'Amen')

(a) Emphatic agreement with a poignant statement or significant point.
(b) Fervent emphasis of a point that everyone should hear

Generally followed by an informal salutory noun (e.g., bro, brother, son, dawg, etc.)
Person A: "The war in Iraq has destroyed our relationship with the rest of the world, bred more terrorism, and crippled us in dealing with Iran and North Korea. It is one of the biggest debacles in U.S. history"

Person B: "Stereo, son!" (alternatively: "That's stereo, son!"
by B. Nott October 13, 2006