[:' (]

All of those, what do they mean? I know what some of them mean and I know what some of them look like. But I usually don' t use smileys when I' m chatting over the Internet so there are many of those smileys I don' t understand.
I would appreciate if someone could explain all of them, what they' re supposed to look like and in what situations they are used.

What the hell is that?
Freak?
Fat purple guy?
Insecure?

Please, could someone explain them, not only the four ones above but all of them.

[:' (]