Stalker slang for someone who has been successfully intimidated into confining themself to their home, venturing out rarely, like a tortoise sticking their head out of its shell.
My ex-partner is such a tortoise, I wait outside their house for days and never see them until they dash out for groceries. Job done.
Tortoises are horrible, disgustingabominations ruled by the tyrant Presidant of the United Testudines of America, Donald J. Tortoise. These horrid BEAST where once peaceful with the turtles and terrapins, until they suddenly attacked, why they did this is still unknown, but Presidant Donald Tortoise is proven to be a part of it by Queen Turtahl IV of the TU/Testudine Kingdom's spy's. Hopefully someday the Turtles will successfully rise against these terrible tyrants. The shibe in the gif by the way, the tortoise is taking it as a slave.