Is just up their street - Idioms by The Free Dictionary
be (just/right) up (one's) street (redirected from is just up their street)
be (just/right) up (one's) street
To be ideally suited to one's interests. Anna loves watching movies, so I'm sure she'll go to the film festival with you—that's right up her street.
be (right) up your ˈstreet (especially British English) (American English usually be (right) up your ˈalley) (informal) be suitable for you: Why don’t you apply for this job? It looks right up your street. OPPOSITE: not be somebody’s cup of tea