black belt1 
noun
1A black belt worn by an expert in judo, karate, and other martial arts.They also trained the police students who all held first or second black belts in judo or kendo....
- Sensei Ortino has been active in the martial arts for well over 30 years now, and holds black belts in several different martial arts.
- He had done martial arts since he was five and had earned a black belt in karate.
1.1A person qualified to wear a black belt.Some judo black belts joined him as they were fascinated by the art that allowed one to throw everyone easily to the ground....
- Many of them are black belts in other martial arts too.
- My father is a black belt in karate and I grew up with him, so I was involved in the martial arts.
Black Belt2
An agricultural district in central Alabama and Mississippi, named for its rich soils.