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1.
A thing, a whatsit, a widget -- a thing with an otherwise unknown name in Richmond Virgina parlance. The origins are unclear although there is a Jahnke Rd. in Southside. Rhymes with yank.
"That jahnke on the bike that shifts gears doesn't work, it's acting stupid."
by Chris Hoover January 17, 2006
 
2.
One who is homosexual
Matt over there is a jahnke.
by The_Tree November 19, 2007