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to have a huge mole on your penis
Jon has a huge cahill, girls dont like it!
cahill by charlie roids November 9, 2012
A term used when someone tops another persons idea or story.
Brad just cahilled his story.
Cahill by Cahilled October 26, 2013
Man those Cahill’s are cool
Cahill by anonymous July 13, 2021
God, she's such a Cahill
Cahill by Rct0712 October 26, 2022

Cahill Pour  

An Irish drink pour where it is fill to the rim of a glass or close to it. It is also triple then the normal drink pour.
Hey Babe, I ask for a Cahill Pour this glass is half empty.
Cahill Pour by Matt Cahill February 21, 2009

cahill'ing 

When one player in a competitive game decides to help another player win, without providing any benefits to the player conducting the cahill'ing.

Often done in order to seek revenge against other players or be a tool.
Oh damn, Cam was totally going to win that game of Catan last night - until Chris decided to start cahill'ing the fuck out of him with stupid trades.
cahill'ing by ZacharyJay May 18, 2018