Definition
a response to a statement or notion that is obvious or already widely known
Origins
Originates from African-American Vernacular English. Its first use dates back to the late 90s.
Also Said As
- duh
See Also
- there is nothing new under the sun
How People Actually Use It
a way to say you already knew something; to point out that the thing someone just said was obvious to a majority of people
""I think bell bottoms might make a comeback this year" "WE BEEN KNEW, I was wearing them last year, y'all behind""
Source: Urban Dictionary