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Along the same lines as MILF but for princesses rather than mothers.

A term created by Andy Zaltzman in edition 134 of 'The Bugle' (The Times Online) podcast in order to describe (soon-to-be) Princess Catherine Middleton's sexual allure.
Princess Michael of Kent, now there's a PrILF !

Not like that skanky ho Princess Beatrice.
by Our Royal Correspondent November 22, 2010
A priest I'd like to fuck.
Have you seen Monsignor Bruce's new cassock? He is a PRILF!
by Jiglet October 07, 2011