I put my hand in his pants and was dissapointed to find he was only packing a "Babys Thumb" down there
by Randall Van Strauss October 26, 2010

Hey Planky I'm getting chased by a gang of triads with samurai swords help me man
Replys with a thumbs up... The thumb cunt
Replys with a thumbs up... The thumb cunt
by baconsarnie June 11, 2014

by ApolloStar March 22, 2016

The action of putting thumb into butt hole before sitting. America's favorite past time for when you are bored and no plans.
by UmmWhatchaSay March 3, 2018

Commonly used term orginating in the early 1900s, when it was legal for men to beat their wives, as long as they used a stick no wider than their thumb.
Rule of thumb? Can't do too much damage with that thing, can we? Perhaps it should have been the Rule of Wrist. - The Boondock Saints
by YousaywhyIsaywhynot October 23, 2006

by carnuga February 27, 2009

by 29A April 28, 2005
