Pejorative. A male homosexual, so-called due to the propensity of the tip of the male member to become coated with feces during the act of anal intercourse.
When evidence is presented of one's physical assault on a spouse/significant other, the act of mumbling inane excuses such as memory-loss. Named after Chris Brown's appearance on Larry King.
"I don't know how she/hot hurt, it was all so confusing. I must have ... mumblemumble."
"That's just a bunch of brownbatter. You need help."