jigger, chigger, digger noun a door la16-. etymology: Romany has the form jigger; cited in OED as ‘slang’; attested by Galloway and Perthshire and Argyleshire Tinkler-Gypsies, SR; also collected and attested by JS; Partridge: ‘Cant ... current between 1600-1900’; also collected by EMcC/PS; forms chigger, digger attested in Shelta note:

Grose and Egan (1823) attest ‘jigger a door’ as ‘Sea Cant’.

Canadian Paul Pope (2013) cites the form jigger with the same meaning.