Butter Thumb 

A flaccid, shriveled, post-coitus, penis and is still moist and shiny from the amalgam of sexual juices.

After Roger tapped his girlfriend during a lunch time quickie. Sonja went to the bathroom to wash up and grab a doddle rag to come back and wipe off Roger's Butter Thumb.

Butter Thumb by Eaton Holgoode May 19, 2015

Thumb Butter 

When your wiping yourself and your thumb accidentally breaks through the toilet paper and gets "dirty".

Dude! I dropped the kids off at the pool last night and got covered in thumb butter when I was wiping with that cheap paper my wife buys!

Awww man that is the worse!

Thumb Butter by minuccp May 1, 2009

thumb-buster 

A single action revolver, so named because the hammer must be cocked by the shooter's thumb each time the weapon is fired. The Colt Peacemaker is an example.

He drew down on me with a thumb-buster .45.

thumb-buster by Steph the gunner April 22, 2005

Thumb Butted 

When you stick your thumb in a girls butt during sex. You've gotta love it like it's your last.

Person 1: Yooo how was your night?? Did that girl sleep over?
Person 2: Ya lmao I thumb butted I think I love her.

Thumb Butted by BigKidsAreLarge November 8, 2016

Butterthumb 

A girl who is perfect, except her thumb. AKA butterface.

More info at www.butterthumb.info

"Megan Fox is such a Butterthumb"

Butterthumb by EyeAddiction July 26, 2009

Butterthumbs 

Like butterfingers when dropping an item but related to creating tons of typos while texting.

Are you suffering from Butterthumbs today? I culdn’t unfersrand ur trxt.

Butterthumbs by Truthspeakerspirit January 16, 2019