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1.
Another word for dolphin.
Wild phins don't like unsolicited touching; they will interpret it as aggressive behaviour and hence bite your hand.
by Allen McCloud April 12, 2007
 
2.
A psychotic rapist. Well no, more like a rather bizarre young man whose favourite pasttime is raping other men in the showers. Used in either a supporting or derogatory fashion, depending on the connotations of the sentence. A positive usage constitutes a dominant male without any competition.
A positive use of Phin: Man, did you see that guy the other day? He looked like a total Phin with that girl!

A negative use of Phin: The guy's such a Phin... Did you hear about what he did to my neighbor?
by Zeit January 27, 2008
 
3.
Adjective. Another word for "phat".
Your new burberry is phin, innit.
by Animosity November 30, 2004
 
4.
Derived from the word 'Phinaguermas'-(Latin)
Meaning one who is sexualy attracted to house hold pets
"My Brother is Phin!"
by Ra6999 June 19, 2006