Definitions
1.nounThe 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.
2.nounThe part of a slider that may be moved linearly along the slider.
3.nounA thumbnail picture."2001, "Gary", Wanna See Porn? Take a Look At These (Free Expandable Thumbs) - CLICK HERE (on newsgroup alt.sex.services)"
4.verbTo touch or cover with the thumb."to thumb the touch-hole of a cannon"
5.verb(with through) To turn the pages of (a book) in order to read it cursorily."I thumbed through the book and decided not to bother reading it all."
6.verb(travel) To hitchhike"So I started thumbin' back east, toward my hometown."
7.verbTo soil or wear with the thumb or the fingers; to soil, or wear out, by frequent handling.
8.verbTo manipulate (an object) with the thumb; especially, to pull back the hammer or open the cylinder of a revolver.
9.verbTo fire (a single action revolver) quickly by pulling the hammer while keeping the trigger depressed.