Top Definition
The opposite of a green thumb; a person who doesn't know his brass from his oboe about taking care of plants.
Who are you giving that tree to? I wouldn't trust Lana. She's a brown thumb. You give her any plant, it'll be dead in one day!
by pentozali December 20, 2007
The act of waking up early, dropping the dugan of your life, and then frantically wiping to complete the experience; unfortunately when wiping the excess remains on your thumb.
Dude, I passed the most amazing BM that there was nothing that I could do to avoid the Brown Thumb.

(calling best friend) {You} You would not believe what happened this morning. {Friend} I cant talk. {You} It involves the brown thumb. {Friend} I've got time for that. Tell me more.
by +8 January 08, 2009
A recently formed yet very successful gang based out of Jensen Beach, Florida. With branches spreading as far as Orlando. The gang consist of many key members such as: Thumb Master Poo, Squirts, Big Dump, and Smelly Mike. Also there is rumor of the gang releasing a new album called 'Under My Thumb' with a potential hit single called 'We Just Thumb'n'. Ways to identify a Brown Thumbs member is a BT located on their neck as well as their thumb tattooed brown.
Yo, watch out for them brown thumbs. They'll shit on you.
by Thumb Master Poo February 15, 2015
A person who enjoys sticking their thumb in peoples bum and sometimes the brown thumbs own bum.
Don't shake hands with a Jackie they're brown thumbs.
by one thumbs up August 21, 2010
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