1 definition by Danliv2003

Top Definition
A portmanteu of thumb and stumble, works best when used with up or down to signify delight or disgust about a page using the Stumble Upon toolbar.
"dude, shit's cash, thumble up"

"ewww, no more Nailin' Palin for me, thumbled down"
by Danliv2003 November 05, 2008

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