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1.
originated from somebody with the sirname of wain.

now it just means they look dozy act a bit stupidly and may even have a cockzipilis

also to be a wainer you need to be known for making a noise like UHHHHHHHHHHHHHHHHHHHHHHH in a load deep voice (try it now)
Nick: hi wainer

wainer: UHHHHHHHHHHHHHHHHHHHHH

Nick: oh so the cockzipilis is still bad then
by the mighty zipilis July 10, 2008
 
2.
The southern way or saying "weiner"
Guy1: So what do you think of my wainer Paul?
Guy2: Well I'd say its good enough to enter the county fair
by kreeves January 11, 2012
 
3.
To Wainer someone is to make them better looking or better endowed.
We took Brian out and wainered him. Girls love him now.
by Robert from Louies May 02, 2008