to
push someone to the limit of his abilities, especially someone's physical
skill or prowess in his area of expertise; (probably originally musical
slang)
You'll enjoy drumming for
Karen, but you'd better keep up your practice -- the speed she wants during those
long solos will bust your
chops.
Working with platinum is bustin' my chops, I wish I could go back to working in silver.
Bustin' chops is his favorite thing to do on the midterm, so make sure you've memorized all the formulas.