Believedat

Arguably originated in New Orleans, LA though it is widespread throughout the southern region of the United States. Made popular nationwide by Dwayne Michael Carter more commonly known as Lil' Wayne, "Believedat" (pronounced ba-lee-dah) is a combination of the words "believe" & "that". It is used to reinforce a previously made point or objective.

I don't care what day it falls on, when its my birthday I'm going out, popping bottles, dancing my ass off and bringing someone home with me...believedat.

Believedat by MrWardTheSecond August 13, 2009

Widely Believed Fact 

An oxymoron that described a piece of information, theory or idea that despite being repeated frequently, quoted in the media, and known to practically everyone you ask in the street, is still false or misleading. Often used to describe theories in popular science that may have little or no valid evidence to back them up ( A fact that has not been proved is like a virgin who has intercourse, so the phrase is contradictory.)

From the quote by Professor Hubert Farnsworth ( Character in Futurama ) describing an old wives tale

Immunizations cause autism - It's a widely believed fact!

Widely Believed Fact by D F Stuckey October 31, 2008

she believed 

he lied

when she believed but s(he) be(li)ev(ed)

she believed by @skeeskrrt April 21, 2019

She believed 

He lied.

She believed he didn’t cheat.

She believed by Imurbanru May 8, 2019