To do a lewwie is to activley persue a homosexual lifestyle while pretending to be straight. It is mostly used in the deepest and darkest regions of west yorkshire.
For example: 'Hey dan, check that guy over there, he's a real lewwie! why not ten minutes ago I saw him kissing Boothy and now he's chatting up those girls. Sick!'
by H Jouse February 27, 2008