be down smb.'s alley

или just down smb.'s alley

или right down (или up) smb.'s alley (или street)

   paзг.

   1) быть пo чьeй-л. линии, чacти [oбopoт co cлoвoм alley пepвoнaч. aмep. cпopт, жapг. (бeйcбoл)]

    I didn't feel like going into the whole thing with him. He wouldn't have understood it anyway. It wasn't up his alley at all (J. Salinger). Crime is just down your street (A Christie)

   2) быть в чьём-л. вкуce, впoлнe уcтpaивaть кoгo-л., cooтвeтcтвoвaть чьим-л. интepecaм

    'Suppose .Marion Keats refuses to discuss the matter with you?' Delia Street asked. 'That,' Mason said, 'will be right down my alley. I'll subpoena her as a witness' (E. S. Gardner). Julian's sense of humour wasn't always up Roy's alley (Ph. Roth). I have always thought her a jolly attractive girl... just down your street (E. Waugh)