A small, effeminate person (twink) who wears comfortable clothes like sweat pants, large hoodies, or sweaters
Girl 1: Have you seen how that person dresses? They never put any effort in!
Girl 2: Oh yeah, that's Alex, he's a pillowcase twink.
Girl 2: Oh yeah, that's Alex, he's a pillowcase twink.
by Ugandan Chungus January 11, 2019