The tag alias #73563 midriff_showing -> midriff has been approved.
Reason: https://e621.net/wiki_pages/267
"Images or animations that depict a character with a flat stomach or midsection exposed."
midriff_showing is unnecessary because it is the very definition of midriff
EDIT: The tag alias midriff_showing -> midriff (forum #423819) has been approved by @spe.
Updated by auto moderator