When someone is doing something out of pocket but is compared to it being innocent. You can also refer to someone as "silly" if they are just being goofy. This definition of the word is mainly used in TikTok, being associated with "Silly" images of cats.
"I can act rather silly at times"
"I got too silly"
"Bro's silly"
1. Silly as in wholesome and whimsical, like in silly cat videos where the cats are very cute and fun. This way can be described as "positive silly" or "the good silly" and if you want to use a tone tag for it "/ns" for "not silly" like it's more popular other meaning :3
2. And silly as in lustful and devious for a person, character, celebrity, etc. So like just being really down bad for someone and saying really "Silly" things about them or just expressing any kind of "simp" behavior