...the sexual act , by a male usually, of reaching around and inserting a thumb into one's anus, before pooping on the sidewalk,
I saw someone downtown on the sidewalk giving himself the San Francisco Thumb Punch. He must have been constipated because he was in there for a while...
by ThatsFuctUp September 17, 2025

by Winkey the beedle of time January 26, 2009

by cumslider February 1, 2024

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

by Not Guitarist Ryan May 20, 2021

by Syafie October 18, 2022

by Bk102886 November 14, 2020
