YCH stands for Your Character Here, mostly seen in the instances of commisions of art, tempting someone to buy a commision from an artist (sometimes from an auction) using an empty character they can mentally replace with their own character.
Auction: YCH!
Art for sale! Look! YCH!
235👍 19👎
Ych-a-fi, someone's left their dog take a dump on the doorstep!
71👍 22👎