When you and your girlfriend/boyfriend inch your thumbs closer to each other’s anal cavity until penetrated. Whoever yells mercy first loses.
by Childo Chief October 15, 2019
 Get the Thumb Warmug.
Get the Thumb Warmug. "Ohhh- weee look at that blush thumb, pressin up against her panties. Thang big as hell, finna pop out!"
by atm TJ July 30, 2019
 Get the Blush Thumbmug.
Get the Blush Thumbmug. by Mermerbug February 1, 2019
 Get the Millennial Thumbmug.
Get the Millennial Thumbmug. by Broguy22 July 30, 2018
 Get the Thumb Wingsmug.
Get the Thumb Wingsmug. ur absolutely in love w ur ex
by im obsessed w green eyes August 5, 2022
 Get the thumb upmug.
Get the thumb upmug. When one is bored and lonely so one masturbates with a thumb wedged knuckle-deep into one's own anus.
by J. M. Fuhqueny November 5, 2023
 Get the Thumb-Bumminmug.
Get the Thumb-Bumminmug. 