In Messaging, a subtle inquiry as to whether the other party composes text and thoughts at the same crawl.
by Zappin' Nap April 29, 2021

by Not Guitarist Ryan May 20, 2021

A Thumb Bump is a fist bump with a thumbs up to finish it off. Originated on classic TV show Thunder in Paradise. Randolph "Hurricane" Spencer and Martin "Bru-dog" Brubaker would do a Thump Bump to celebrate a job well done.
by HurricaneSpencer August 12, 2022

"The fact that pages 136 & 137 were stuck together in the Hustler magazine at the sperm bank was an obvious indication that someone had been there cum thumbing it previously."
by billebllunt December 31, 2013

by cumdiddlediddle May 20, 2021

An approximate way of doing something based on presumptions rather than fact. Contrary to popular belief, the idea the law once allowed a husband to beat his wife as long as the device was no thicker than his thumb is false, as such assaults were outlawed for centuries in common law, although the ban wasn't generally codified in written law until the 1980s.
A driver kept going 5 mph over the speed limit, thinking the police had a rule of thumb that it was a waste of time to give out a ticket to anyone going anything lower than that.
by BlastFurnace February 27, 2025
