One of two things:
- Device for elevating the port side of an aircraft and thus essential to prevent it from corkscrewing out of the sky.
- Term used to describe a political stance - the opposite of Right Wing. Individuals who subscribe to the Left Wing ideal are invariably self-important, Grauniad-reading mongs who think that an all-controlling Stalinist überstadt dressed up as a Star Trek-style multi-culti Utopia is possible. They are the cancer that has eaten in to every quarter of the public sector - especially national and local government - with a heavy emphasis on the latter. The men think and dress like it's still 1968 and the women are all lesbian. Beam me up!