Click the EQII button (by default in the lower left of screen) and there is a list there. Not sure, as I am not at home, but I believe it is listed as "Socials".
Or you can hit the "O" key. I think it's the sheer amount of emotes you can do, but I couldn't find a few, that I've done, on the list. One I remember is /sneeze.
found this thread on another board, looks like a complete list. http://boards.stratics.com/php-bin/eq2/showflat.php?Cat=&Board=eq2tavern&Number=10634&page=4&view=collapsed&sb=5&o=0&what2=postlist&fpart=