General

The Eating emoticon...

:G

I like the way it suggests someone putting something in their mouth. Plus there's that "G" for "Gluttony".

It might be a fun one for eating while chatting on-line. Every time you take a bite, type it out!

Or could be an even better stuffing game, every time someone types it, you have to take a bite.

And of course there's the "angry eater":

>;G

The melancholy one:

(:G

And of course if you eat enough you get a double chin:

:G))