Britney last edited by
Oh Yeah? is a verbal return to an action or more likely the oral depiction of an action (that may or may not have happened) to which the author of this phrase does not like. This is usually quite a startling way of saying [Over my dead body]. Oh yeah? is most always followed by physical violence and expletives galore.
* These videos are coming directly from Youtube, they may or may not be most relevant to the word "Oh yeah?"