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1.
pronounced 'u-reh-dee', exactly like 'you ready?'

Used online to describe a great post (usually music related posts) or during an intense build up at a music festival/rave just before the drop of your favourite song.
At a music festival, the DJ begins playing Rebound by Arty & Mat Zo

'URDY?!'

Someone might tweet 'A&B just dropped Alchemy! #URDY?'
by ohherro_ August 27, 2013
 
2.
A lying philanderer.
That Urdy cheated on his wife with multiple prostitutes.
by Finallysingle June 10, 2011