by Leruho Kdfcoi November 20, 2006

Psychology: A passive defense mechanism, showing a gesture of dishonest approval, satisfaction, or appreciation for something...
"Hi Jack I like your hair it looks great!" Jack responds, "Thanks! (even though he knows it looks like crap) giving her a thumbs up gesture."
by Tobacha February 17, 2017

A texting friend on social media accessed from a smartphone, since you type mostly with our thumb in order to communicate.
by Storybored December 28, 2016

A deformity of the thumbs when the bone is too short. Also goes by the name of Clubbed thumb. It is genetic and was founded on Octiber 11th, 2003 by Emma Tappe.
by Xxacumguzzlerxx October 30, 2018

by CAULLEN January 28, 2005

A homosexual advertisement for men. When a guy wears a thumb ring, he is open and willing to engage in anal sex, rimming, reach-arounds, and all glory hole activities.
"Do you have any thumb rings for sale?"
"I'm sorry, but we are all sold out after the PRIDE parade last week"
"I'm sorry, but we are all sold out after the PRIDE parade last week"
by Snyper1d May 10, 2014

by Andy McLeod February 5, 2004
