Top Definition
The barrier your significant other puts up when you ask for anal sex.
"No way! You ain't getting past my Brown Barrier!"
by Dethndrek May 29, 2004
1 more definition
Phrase used to describe the point in a race when an individual or team give up for no obvious reason. More often than not to be found a little past the halfway point and is not dependant on the length of the overall course. It is used frequently in conjunction with the term Puma.
They may be in the lead at the moment, but with the Puma onboard they'll hit the Brown Barrier just past the half way mark.
by Charles Henry Ocolate-Puma June 19, 2003

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