noun
attraction to ugly people; person who prefers ugly partners
Slang term, often used self-deprecatingly or humorously. Can refer to the preference itself or a person with that preference. Compare ビー専 (attraction to beautiful people).
See also: ビー専
彼は自分でブス専だって言ってるよ。
He says himself that he's into ugly people.
ブス専の友達は、見た目より性格が大事だって。
My friend who's into ugly people says personality matters more than looks.