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.

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.

Kind of blowjob, when one girl sucks your cock and another licks your balls.

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.

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.

Code word for girl with really good breasts.

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.)