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 September 13, 2003

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?

by RandalPnk October 16, 2007

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 14, 2005

Thumbkin

Performing the act of splinting on a consensual female partner, while performing oral sex on her. This involves inserting your thumb into her vagina, pushing down towards the anus to help her relieve constipation, while sucking on her clit.

"My lady was horny as hell, but also constipated so I offered to give her a thumbkin. The simultaneous orgasm and poop drove her absolutely wild with pleasure!"

"I bet it did! You're an inspiration to us all my friend."

by MarkHanna June 7, 2021

Thumbkin

When someone sticks their toe in your anus while going down on you at the same time.

Kimberly was mortified to hear that Christy let that carnie give her a thumbkin. What a ho!

by GTizzle1386 May 19, 2015

Thumbkin

Performing the act of splinting on a consensual female partner, while performing oral sex on her. This involves inserting your thumb into her vagina, pushing down towards the anus to help her relieve constipation, while sucking on her clit.

"My lady was horny as hell, but also constipated so I offered to give her a thumbkin. The simultaneous orgasm and poop drove her absolutely wild with pleasure!"

"I bet it did! You're an inspiration to us all my friend."

by MarkHanna June 7, 2021