>>117353805They're talking about the so called 'Tumblr art cringe'. They're drawings with deliberate appearance flaws, such as stretch marks, leg hair stubble, self harm scars, overweight/anorexic bodies etc. I think the artists and their followers see these as hyper-realistic and relatable.
The most infamous are fanart pieces with significant modifications to the original designs, complete with race change, non-binary gender stuff and pronouns.