to be smilly; the state of being silly and happy at the same time; a mix of smiling and silly.

Mix of smart and silly put into one word. Alex thought of it...lol i know alex?! Who would have thought!

a facial expression; turning up the corners of your mouth but tightning up of your lips while shrugging.

An alien form of the common smiley
it is the same but with 3 eyes

I don't know really, I think it's when you're smiley and silly, and my dog's bed says "SMILLY DOG" so I don't know.