thumb
/θʌm/noun
Definitions
The short thick digit of the hand that for humans has the most mobility and can be made to oppose (moved to touch) all of the other fingers.
The part of a slider that may be moved linearly along the slider.
A thumbnail picture.
Example: 2001, "Gary", Wanna See Porn? Take a Look At These (Free Expandable Thumbs) - CLICK HERE (on newsgroup alt.sex.services)
verb
Definitions
To touch or cover with the thumb.
Example: to thumb the touch-hole of a cannon
(with through) To turn the pages of (a book) in order to read it cursorily.
Example: I thumbed through the book and decided not to bother reading it all.
(travel) To hitchhike
Example: So I started thumbin' back east, toward my hometown.
To soil or wear with the thumb or the fingers; to soil, or wear out, by frequent handling.