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3.
feces, product of defecation, another word for shit, or a derogatory word used towards someone who is being distasteful
for feces
person 1 "where you going mate?"
person 2 "i gotta go hang a dirt bird"

derogatory meaning
person 1 " i just had sex with a frog"
person 2 "oh your a f**cking dirt bird"
by jamie $ January 22, 2008
 
1.
Irish slang used by scumbags for someone they consider morally lower than a scumbag, typically a paedophile or murderer.
"that Christy from number 98 deserves jail after what he did to jacinta, f&*kin dirtbird"
by womoma April 15, 2005
 
2.
A woman of ill repute. A promiscuous female. A dirty, venerial whore who men should not touch with the longest of bargepoles.
"That Mavis is a right whore. Barry caught glowing herpes off her, the fecking dirtbird."
by Murf Murphy. April 08, 2006
 
4.
a girl or woman who goes out and hangs around clubs and bars in skimpy clothes. to attract a drunk male for coitus
"look at her dave id fuck that"
Urgh why shes a fuckin dirt bid shes proberbly had more pricks up her than a heroin addict!
by mike January 05, 2004
 
5.
Localised - Dublin, Ireland.

A Dirt Bird can also be someone who'll do anything to finish something, low morals. A person that'll stoop to anything, basically.
You're a fucking Dirt Bird.
He's a Dirt Bird.
Yer ma's a Dirt Bird.

(simple exclamation from a crowd to a single target) Dirt Bird!
by SM January 28, 2005
 
6.
Someone who doesn't wash that often. (Northern Irish slang)
He's such a dirtbird, you can always smell him before you see him.
by Boc2 November 09, 2007
 
7.
small, possibly stupid birds that sleep in the dirt during the darkest of hours. When approached on bike, the elusive dirtbird will frantically fly in the face of the on-comer. A defense mechanism? Or perhaps another cruel joke by Mother Nature...
I was railing around the corner on the fire-road when this fucking dirtbird flew in my face.
by The Dirtbird Hunter November 06, 2006