Marijuana that is brown in color and makes the purchaser feel like a clown. It is typically the weakest of strains and proccessing almost always includes compaction and packaging somewhere in mexico. Users of brown clown typically experience a headache shortly after use.
Jason: "Dude I just scored the worst brown clown ever."
Travis: "No kidding, I've got a killer headache to prove it."
Jason: "I feel like a brown clown for buying this crap."