When a quite large muscular thumb is used to penetrate a desired orifice, can be used in a sexual manner or just may save your life, but it's mostly for the memes. Comes from when Scott Allen DeShields, Jr., whose YouTube channels name is Kentucky Ballistics, had an unfortunate accident involving his RN-50 exploded causing a piece of shrapnel to sever his jugular. The use of his thumb jammed into the wound cavity putting pressure on his artery is what saved his life. His optimistic humor with the phrase "put a thumb in it" has led to the creation of this term.
by FreshWolfMilk May 20, 2021

The act of introducing a thumb in the rectum of a woman while performing sexual congress with said female on her hands and knees.
by GESCALANT May 20, 2021

When having sex doggy style and she says she needs to use the restroom, insert your thumb into her anus and tell her go keep going you are keeping pressure on it.
by JDV218 May 20, 2021

by Trigger3866 May 20, 2021

To put your safety thumb in you’re partners butt, mouth, or other holes of the body as a safety precaution.
by Brandon Herrera subscriber May 20, 2021

Where your brother, sister, or cousin sits in the corner and masturbates, then after a while all you hear while your getting raped is "incoming" from them as they cum on your face and their fingers and put in on your face like a wakandan
by Why is every name taken fml August 31, 2018

When you put a Kentucky Fried Chicken drumstick up your butt in the lobby of a KFC in Brazil, Indiana.
by borkanese May 21, 2023
