up one's alley

Well suited to one's interests. I really like Romantic poetry, so this class on John Keats should be up my alley. I'm sure Dave can fix your car—mechanical things like that are really up his alley.

see under right up one's alley.

To be in one’s particular specialty or to one’s precise taste. The word alley has long been used for one’s special province; Francis Bacon so used it in his essay Of Cunning (1612): “Such men . . . are good but in their own Alley.” Up one’s alley, however, is a twentieth-century turn of phrase. Margaret Carpenter used it in her novel Experiment Perilous (1943): “It isn’t up my alley at all.” See also not my cup of tea.