Thumb-butting

When you are hitting it from behind and have your thumb in her butt at the same time. Thumb-butting it.

She seemed like she wanted it so to test the waters I was thumb-butting it.

by Blibicer November 26, 2017

Thumbs Up

you’re obsessed with your boyfriend

She put both Thumbs Up, she probably stalks her man

by Thisisntmyrsalname1 September 17, 2022

Kentucky thumb

While playing the giver in the "doggy style" sex position, insert your thumb into the rectum of the reciever.

I Kentucky thumb'd your girlfriend last night.

by The Cryomancer May 20, 2021

Thumb Plumb

A thumb plumb is when there is a lump of shit left on the thumb after thumbing an arse.

Holy shit, you should have seen the size of the thumb plumb she left.

by Biggaybear April 2, 2013