I am just curious to know what U_U means. Anyone?
This is a type of text smiley. the U’s are supposed to be the eyes, the underscore is the mouth. I would guess that one in particular expresses exhaustion or sleepy (like closed eyes) or sad. Some other variations
^_^ Very happy
-_- Irritated, *sigh*
o_O another variation on shocked
Looks like a face with closed eyes lol.
Smiley meaning that you are sad or disappointed.
i think it is a smile of a person with closed eyes