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1.
A female who displays desirable male characterstics (such as toilet humour or alcoholism) without sacrificing their feminity.
The way Miriam downed beer out of a teapot made me think she was a proper "Geezerbird".
by Lotney Sloth April 14, 2008
 
2.
A girl who dresses or looks like a man.
Also see Mushmalt
Shes a right geezer bird
by Ben Davis November 06, 2003
 
3.
A beer-swilling girl who doesn't have the class to realise she is outdoing the guys and its not attractive.
"That geezerbird knows more football songs than my old man, scary!"
by Petrogol August 17, 2006
 
4.
A pre-operation transsexual. A man with make-up, see he-she.
Geezerbirds wear lots of bright make up and have deep voices and stubble.
by Kung-Fu Jesus April 30, 2004
 
5.
Unusually deep voiced female
That "Tess" from Neighbours was a right GeezerBird.
by Britech January 06, 2004