Chops
Ability to play a musical instrument. From the slang term "chops" for jaw, it originally referred to singers and perhaps wind instrumentalists. It eventually grew to include any type of instrument, though it is mostly used for instruments in more popular styles. (That is, you're more likely to hear about Eddie van Halen's chops than Yo-Yo Ma's.)
I love listening to Jeff Beck. That guy has some serious chops.