Verb:WIGGLE

WIGGLE makes a character wiggle, shake, or flap a specified part of the body.

>wiggle

Usage:
    WIGGLE [MY] (area)          - Wiggle (area).
    WIGGLE [MY] (area) {target} - Wiggle (area) at {target}.

Where (area) is one of the following:
    ARMS
    EARS
    EYEBROWS
    FACE
    FINGERS
    HEAD
    KNEES
    NOSE
    TOES

>wiggle my arm
You tuck in your arms and flap them like a bird.

>wiggle my ear
You wiggle your ears.

>wiggle my eyebrows
You wiggle your eyebrows.

>wiggle my face
You vigorously shake your head.

>wiggle my fingers
You wiggle your fingers.

>wiggle my head
You vigorously shake your head.

>wiggle my knees
Your knees begin to shake.

>wiggle my nose
You wiggle your nose.

>wiggle my toes
You wiggle your toes.

Third-person targeted messaging is not substantially different. Actions are done "at you" or "as s/he glances at you" (arms/knees).