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2. thumbkin
Crazy ass gun wielding honkies from the "thumb" of the State of Michigan.
Terry Nichols was building bombs to level government buildings, but what else can you expect from a thumbkin?
1. thumbkin
The act one sticking one's thumb up someone's ass. Similar to wedgies and wet-willies, thumbkins are generally considered more 'classy' and are often used in gentlemenly situations.
"I say, I do believe I have received a thumbkin!"

"Thankyou sir may I have another?"
by Son Sep 13, 2003 add a video
3. thumbkin
1. (n) A small, thumb-sized penis.
2. (n) The owner of a small, thumb-sized penis.
Just between you and me, Phil is a thumbkin.
by Heptune May 11, 2005 add a video
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