If you're talking about actions by your Meez while in Roomz or in Hangouts in MeezNation, then...
The following list and a Note was compiled by itsjustthemeds and in it's original form, posted on her awesomely useful thread : Frequently Asked Questions For the New Everything
List tells you what to type in
, followed by corresponding action by Meez
Ommm: Floating Meez
Dance or Boogie: dancing meez
rofl: Meez rolling on the floor laughing.
*rap*(yes, with the asterisks): Rapping/singing Meez
Yay: jump and kicking heels together
Zzzzz or brb: Meez 'sleeps'
Omg: Surprised Meez
Wtf: funny animation (it's supposed to look confused or outraged)
Kiss or XXX: Meez blows a kiss
*spin*: Meez spins in a circle
Related: I tried those trigger words, but it didn't work...why not?
When first 'learning' an animation in the roomz you must type it twice to get it to work. After that you only have to type it once.
(I also added some more that were posted by others, to the above list.^^)