look up any word, like dirty sanchez:
To IFMD: Is to partake in the act of fucking ones father, or dad. IFMD Is merely an acronym for "I fuck my dad". But really it doesnt matter whos father you sex, because you can always just yell IFMD.
"Hey Chris, way to break my copy of Fifa 10!" -Steve
"Im sorry things got a little out of hand when IFMD!" -Chris
by auto_toune27 September 14, 2010