Negro Frown 

A facial expression in which an African-American shows a countenance that expresses a wish for the looker to get the fuck away or I will bust a cap in yo ass.

Loom at the picture of Mac Dre on wikipedia, which is a negro frown.

Negro Frown by Herro Prease Rong Time June 15, 2010

Brown Frown 

marijuana of an exceptionaly poor quality.
also known as bunk

yeah, this rando hucked a sack of the brown frown into the car and told me it was nugz.

Brown Frown by matt L February 9, 2005

downtown frown 

An extremely lippy vagina.

More specifically a girl with an extremely lippy vagina laying down on her side so that gravity pulls her labia downward, making a Frown.

I brought a beautiful woman home last night, but once i got her undressed i saw her Downtown Frown and said "No thx"

downtown frown by Apimpn October 23, 2013

fat frown

A fat frown is the permanent sad face a person makes due to the effects of gravity on their heavy cheeks.

Look at the fat frown on that chubby broad.

fat frown by The Gov JB October 30, 2015

bicycle frown 

The opposite of a bicycle smile.

This occurs when a woman is riding a bicycle (or horse), makes an awkward or uncomfortable turn, and finds the bicycle seat up in them guts.

Jessie had a bicycle frown making that turn onto 37th street. Ouch!

bicycle frown by urbandickchinairy March 3, 2008

turn that frown upside down 

Turn that frown upside down is when someone isn't happy and someone else is trying to cheer them up.

Cindy was having a bad day so I told her to turn that frown upside down.

turn that frown upside down by Yessia Ortiz June 8, 2017

crown frown

when you are crowning so bad it is visibly noticeable in your facial expression

Chris has to shit soo bad he's sporting a crown frown

crown frown by D.S. Nuts June 3, 2008