let me start by explaining the mouth movement.
walk into some place where one can voice chat. and as I talk in Voice chat, i think it would be cool, if my character's mouth moved too, to kind of make it more realistic as though my character was the one talking (from other player's perspective)...
now for the other half.... Drunk chat...
i was thinking it might be funny if we talk into a tavern and drink ale or something to get drunk, and then when we type in chat it gets garbled up, to either be un-readable or doesn't make sense
an example being you type: "where can i find the blacksmith?" and you get: "where
@#$ find smithy" or "find blacksmith can i where?"