A texting face typically used in conjunction with something cute. Known as the "Cat face" or simply, "The Cute Face".

A symbol meant to represent the cat face made by anime characters when they say something clever, or sarcastic, or are commenting on something cute.

an expression used to try to act cute, often used after something weird.

Kinda the '~nya!'(japanese phonetication of english, kitty sound) of the internet. Used to indicate coyness, cleverness, anime-geekiness, cuteness and funny (if not questionably oafy) behavior.

A :3 with brackets for horns, making it a cow. Similar to }:3

Smiley face with Salvador Dali mustache

It's supposed to be a coy internet smiley face, resembling something like a cat, cuteness in nature.

I personally think it looks like a ballsack mouth.