For some strange reason, I looked up the word “twitter” in Webster’s New College Dictionary, and look what I found — “twitter”, as a verb, means:
1. To utter a succession of light chirping or tremulous (vibrating) sounds.
2. To titter.
3. Tremble with nervous agitation or excitement.
As a noun:
1. The light chirping sounds made by certain birds.
2. Light tremulous speech or laughter.
3. Agitation or excitement.