o3o depicts the o's as eyes (like o_o), and the '3' as a puckered up mouth.
Natanya: I just got my tablet in the mail today... so shinyyy... o3o
Nick: Dude, I love your hair. o3o
Matthew: I think I just swallowed a fly. o3o
An emoticon often used by weeaboos, faggots, and 13 year old boys.
Despite the common use of emoticons, this one in particular, is almost always used after every word, pause or sentence. In some cases, even before a sentence.
Seeing this in a chat log or forum post can often cause heart attacks, strokes, seizures and in rare cases Anaphylactic shock.
Faggot : o3o, hey o3o
Weeaboo : o3o what's up o3o?
Faggot : How are you o3o?
Weeaboo : o3o just got done watching naruto o3o
Faggot : OMG o3o AWESOME I luv dat show