Thumb licker

Thumb licker: (noun) a person who puts both of their thumbs in their own mouth then shoves them up their partners,friends, peers, ect. asshole then licks their thumbs again.

Tyler is on that freak shit he's a Thumb licker.

Thumb licker by Thumblicker23 November 12, 2017

thumb locker 

Two small natural holes on the lower back of the girls.

When you see the girl lower back from behind, there might be two small holes, which will fit the thumbs of the hand if you grab the girl around the waist. That will lock the thumbs from sliding on the girls back. Thumb locker will allow the person holding the girl's waist to hold her firmly.

thumb locker by Little Fluffy Clouds January 8, 2012