It's the full name for the domesticated kitty called a tortie
According to their folklore, the first tortoiseshell arose from the 
menstrual... [DOC] [TLE] Caturday felids: a rare male tortoiseshell cat, a paper-obsessed cat ... [PAR] Nov 22, 2014 ... Tortoiseshell cats, or "torties," are cats with patches of orange and black fur, ... a 
male tortoiseshell cat named Harry who has shown up at a cat ... Only the last 
one counts as a proper high five.