partial artist
Someone who studies more than one martial art at a time. Since they can't put everything they have into one style, they usually aren't good at any of them. See also: 95% of hick frat-boys who start 'practicing MMA.'
Douchebag #1: "I hear you started MMA."
Douchebag #2: "Yeah, been working on my Muay Thai, jiu-jitsu, and kickboxing."
Douchebag #1: "So, you're a partial artist."
Douchebag #2: "Yeah, been working on my Muay Thai, jiu-jitsu, and kickboxing."
Douchebag #1: "So, you're a partial artist."