People on FB that think they know everything and consult other FB people on religion, politics and other topics. In reality these people really don't know shit.
A Facebook know it all..... " John, the Bible never said anything about homosexuality, let me lecture you more on shit I don't know about.... "
by Alan Prokop December 22, 2013
Get the facebook know it allmug. Something scene kids say. I'm not sure why, but they do. Often used to be promiscuous about where they stashed their bandanas or something.
"Have you ever spent the night at his house?"
"Oh you know."
-OR-
"Which bandana did you buy?"
Oh you know.
"Oh you know."
-OR-
"Which bandana did you buy?"
Oh you know.
by tBQ November 4, 2006
Get the oh you knowmug. by Korora March 8, 2004
Get the I Don't Know But…mug. by Pete Fresh August 2, 2007
Get the Can't even knowmug. 
when a person sees someone they know make a mistake, they say, "don't know her" as a phrase to take the light off themselves.
by skinnylegend;))) April 30, 2019
Get the dont know hermug. "Let them know oh baby let them know
Coz they can run there mouth but imma
Stand and pose for you"|mabel
Coz they can run there mouth but imma
Stand and pose for you"|mabel
by Onedirectionhsltnhzmlp1D April 14, 2022
Get the Let them knowmug.