Emote

Emoting is the term for any kind of posing action which makes your character do something non-functional in the room, like smiling, laughing, nodding, etc. There are several ways to do this.
The simplest is to just type various emote commands there are many of these, including: smile, laugh, grin, burp, eye, stare, etc. Some are obvious, and some are hidden easter-eggs. Most can be given a target, like smile Gilmore to smile at Gilmore.
You can also use the Pose command too. 
unlike the Emote command, the Pose command checks for objects in the room.
an example of this would be: pose point and laugh at Gilmore.