look up any word, like lemonparty:
 
1.
(Ireland) very, very drunk
After three naggins of vodka I was mouldy.
by gp April 25, 2005
 
2.
1.Big mad sick yoke
2.Absolutley Disgusting
3.Manky or Minging
4.Knacker
oisin boyce is mouldy
by dandiver May 07, 2004
 
3.
When a joint, spliff, macarron or mongo, drops on the floor and is lost for such an amount of time as to lose its thermal action, on the basis of honour and integrity to the individual who dropped said spliff, they shall then proceed to chew and swallow the remains, burnt or smoldering.

Friends shall then wallow in their disgust as a young teenage boy de-pubertises after watching 'two girls one-cup', as it is written in the Gaig bible.
You dropped it and its gone out, that means you gotta mouldy it!
by jimbobsy macgregor February 16, 2011