As the title says, what grosses you out? As for me, it's anything having to do with popping abscesses, pustules, and lumps full of disgusting stuff. Watching Planet Terror and seeing the guy's tongue and face covered in those pustules made me uneasy. Eating internal organs is up there, as well. I just watched a woman in Supernatural eat some guy's heart. Ugh. I also hate the inside of the heart. All those string-like structures trigger my inner trypophobe.
Updated by Lekkiyo