A: Someone who has an unnatural penchant for wearing Speedo style swimming trunks. Usually resulting in them looking rather dodgy.
B: Someone with a large collection of Speedo style swimming trunks.
Guy1: See that guy over there?
Guy2: The one with the handlebar mustache and the supertight Speedo?
Guy1: Ya! Creeepy!
Guy2: Damn, he looks like a Speedophile!
Guy1: Damn! That creep has a different color Speedo for each day of the week!
Guy2: Damn speedophile!