In the oscillations between struggling not to shit and feeling perfectly fine (somewhat analogous to contractions during child birth), the brown flash is the temporary but dire need to take a shit. Often results in sweating, heavy breathing, and a clenching shut of the asshole to prevent shitflow.
After 2 hours of holding in a shit I was brown flashing incredibly hard. My feelings of intense need to shit were becoming closer and closer together and I knew if I did not shit soon I would ruin a pair of innocent underwear.
by IShitALot September 15, 2014
by tadge72 April 25, 2010
Flash Brown is a male pornstar who specializes in interracial porn. Probably one of the most professional pornstars out there, Flash Brown always puts a smile on my face.
by Max "Hillary" Brown March 15, 2016