backdoor
noun
Definitions
A subsidiary entrance to a building or house at its rear, normally away from the street.
A means of access, often secret and unprotected, to something.
A secret means of access to a program or system.
A rear side door of a car, or at the back of a van.
verb
Definitions
To attempt to accomplish by indirect means, especially when direct means are proscribed.
To enter a tube by accelerating from behind; to surf into an already formed hollow wave, in contrast to the normal method of slowing to allow a surfable wave to form.