It's the worst when you're walking down a crowded sidewalk and you get stuck behind someone walking slowly because they're thumbling.
by Munirih19 September 15, 2014

The act of typing with only your thumbs on all typing devices, I.e. Computer keyboards and other devices through the learned behavior of texting on smaller devices such as cell phones.
Jason thumbled out his term papers on his computer keyboard to the amazement of his parents. "Mom, where are the bandaids? My thumbs are sore from thumbling!"
by Walter eagle December 18, 2010

To accidentally send a "thumbs up" in Facebook messenger while trying to type on the small screen of your phone.
Me: I'm sorry I can't go out, my dog died.
Amy: ┏╮
┃┃
▉━╯┗━╮
▉┈┈┈┈┃
▉╮┈┈┈┃
╰━━━╯
Me: I hope you were just thumbling and not that mean.
Amy: ┏╮
┃┃
▉━╯┗━╮
▉┈┈┈┈┃
▉╮┈┈┈┃
╰━━━╯
Me: I hope you were just thumbling and not that mean.
by Roshambo187 July 15, 2015

by Spankednateit August 17, 2016

by HTCS July 07, 2009

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.
by Danliv2003 March 19, 2009

by lyradius August 14, 2011
