right down alley

(right) down (one's) alley

Something that one is or would be very interested in. A variant of the more common phrase "(right) up (one's) alley." Lou loves baseball, so you should definitely invite him to a game—it would be right down his alley. I love science, so studying medicine is down my alley.See also: alley, down

right down someone's alley

 and right up someone's alleyFig. ideally suited to one's interests or abilities. Skiing is right down my alley. I love it. This kind of thing is right up John's alley.See also: alley, down, right