chirrup

1. To utter a series of chirps.
2. To make clucking or clicking sounds with the lips, as in urging on a horse.

1. To sound with chirps.
2. To make clucking sounds to.

1. A series of chirps.
2. A series of clucks or clicking sounds, such as those made to urge on a horse.

[Variant of CHIRP.]

The noun has one meaning:

Meaning #1: a series of chirps
  Synonym: twitter

The verb chirrup has one meaning:

Meaning #1: make high-pitched sounds; of birds
  Synonyms: twirp, cheep, chirp