Definitions:

Disclaimer: I just wanted to create a page (took the page down it's now a post) where some of the emotion icons can be explained for those who have no idea what they mean so here we go( some of these are taken from an awesome blog that i follow but the definitions are culture orientated ):

O_o  or o_O is a side eye look or the look one gives some one out of the corner of your eye, its more of an emotion of "Your and idiot" or "this is BS" just said with a look

O_O is a look of surprise or horror

(I will add more as i use them or think of them)