someone up to no good, a lazy person, a douche.
My ex-girlfriend, the douche-bag, thought I was a N'er do well. But, that's ok, cause she's a cunt-rag.
The posture assumed by one who is very intoxicated - but not quite stumble-drunk.
Sarah - How long has Mike been at the bar?
Joe - I'm not sure, but he's been doing the left-leg-lean for about an hour now.