up (one's) alley(redirected from up their alley)
up (one's) alley
Suited to one's interests. I really like Romantic poetry, so this class on John Keats is right up my alley. I'm sure Dave can fix your car—mechanical things like that are really up his alley.
up one's alley
see under right up one's alley.
up (one's) alleyInformal
Compatible with one's interests or qualifications: an assignment that is right up your alley.