Comic from the Nudealert, formerly Nut dealer, formerly Deltarune, formerly undertale parody comic und(her)tail which kinda unironically has my favorite interpretation of Frisk even if he's mostly there to just get laid.

Comic? Genderbent sans, the funny, "You're gonna have a unfortunate experience" guy who remembers you genocides or something, i cant tell which quote's from where, but i do remember he once said, "I am about to go under the tail" def wasnt Sans AU#3104

Also Sans is a playable character in the hit game (Probably) by Tober The Fox Undertale 2 the undertale with more undertale than undertale coming out soon as in its already out.