Rule of Thumb

During coitus, if you're ready to move from the pink to the stink, but you're not sure if she's into it, you can always gently mash your strongest thumb into her butthole, as if to say, "What do you think?" If she smiles or goes with it, trade your thumb for your cock Indiana Jones style.

SHORT ROUND: Dr. Jones, is that your thumb!
DR JONES: No... not anymore according to the rule of thumb.

by Strangling Jack April 30, 2010

carmel thumb

While engaging in intercourse with man or woman one member of the party proceeds to insert thumb in other members anus and/or there own anus and continues to put it in their/other members mouth.

Man i was having sexual intercourse with sheryl and i totally gave her the carmel thumb.............. she didnt even know what the fuck was up.

by kevin aka cancer May 9, 2006

Thumb Promise

A sacred vow more powerful then a pinky promise. If it is a girl who broke said thumb promise she is intitled to 40 hours of oral sex upon the person who had the promise brokded. If its between two guys you must chop off either of your nuts for punishment.

dont break thumb promises

by Hello kitty 69 May 8, 2008

hammer thumb

A colloquial expression for 'clubbed thumb', a physiological difference where an individuals' thumb appears shorter or 'ogre-ish' in comparison to normal digits; almost like its been hit with a hammer.

Dude, have you seen Megan Fox's hammer thumb? Its totally fucking gross, bro. I'd still it though.

by Notacrook June 10, 2010

thumb job

When a chick rubs the area of a man's body where his ball sack connects to his penis with her thumb(s).

The prostitute will give thumb jobs for five dollars.

by Tom and Mike June 20, 2006

thumb me down

To register disapproval of a definition in the UD by clicking on the icon of the thumb facing downwards.

Woofie was despondent when she found that several of her definitons had received a thumb me down. She had been so happy when she had earlier received a clutch of thumb me up!s. She resolved to never define a word again.........................

by w00fdawg September 23, 2005

Thumb sex

When two people hold hands and run their thumbs around the other persons thumb or twiddle the thumbs.

"omg! Guess wat me and Anton did last night," said Cici
" you mean..." said ary
" we had thumb sex.. In the movies!!!" cici exlaimed?
" did he use a glove?" asked ary

by Definedgirl4756 April 8, 2010