An adjective used to describe something or something who is average or slightly below average. The best way to describe mid is a 4/10. This applies to people, food, music, style, and really anything else whatsoever.
Something that isn’t good like, playing valorant, being a coffee addict, not arguing on twitter, ignoring your dog, having baby tastebuds, baby immune system, can't drink soda, saying you're no mid.