Duffy or ‘Duffball’ as he is better known (apparently it’s because he has only one testicle) is the class joker. He is a complete legend and tells all the best jokes, although most of them are pretty bad. His most commonly used words are wasteman, big-man and Dracula. His most common catchphrase is ‘Glyn is a G’.
by big-man July 10, 2006

noun : Slack vagina, often excretes solid, stinky waste. Often is seen drinking copious amounts of alcohol, then lying about it. A rare species.
One case of this breed of Duffy is known by many in a small area of northern England (Radcliffe). Treat with caution.
by Eflor Mailliw Evad December 12, 2006

by Lohn Fon Bon John June 11, 2014

Accidentally e-mailing, text messaging, instant messaging, BlackBerry Messaging, Facebook messaging/wall-posting, etc. to an unintended recipient.
Ryan sent an inappropriate email to fellow coworkers, but accidentally CC'd his boss. He pulled a Duffy.
Bro, I was hammered and Duffied my mom last night by sending her a booty-text. FML!
Bro, I was hammered and Duffied my mom last night by sending her a booty-text. FML!
by unclsamiam May 15, 2010

by SeanDuffy April 29, 2014

A man who is egotistical. A Duffy is person is prone to kissing up to superiors in hopes of gain. A Duffy is a person who is very fluid with their opinions gravitating to the one that keeps them from getting blowback.
by 5544dadplay April 15, 2019
