Flattened is for characters that have been cartoonishly squished paper thin, but imo that's not descriptive enough on its own.

I want to add 2 tags, one will be "pancaked" and the other will be "painted":
pancaked is for characters that have been flattened, but are still not completely flat against the ground, they may wobble around or they may form a pile.
panited (or alternatively body_painted_against_solid if "painted" is too vague) is intended to be used for when a character is practically painted against the floor, ceilling or wall, unlike above they are unable to move at all.

Example images that would have "pancaked":
post #3887112 post #3891422 post #3448869 post #3411136
Example images that would have "painted":
post #3841752 post #3717035 post #3674341 post #3570950
Asking ahead if that's fine because of this: https://e621.net/forum_topics/37471?page=1#forum_post_358624

If somebody wants to contest either tag suggestion, give me ideas on what I could use instead.

1 - "Pancaked" sounds good, but I'm not sure about "painted".

2 - I think it would be best to indeed create the "Pancaked" tag, and use the already existing "flattened" tag instead of "painted".

3 - And maybe we could imply "Pancaked" -> "flattened"?

Edit: Also, 'painted' brings me this image to mind :p