chirrup

Short definition from Wiktionary

Verb

1. 1
   To make a series of chirps, clicks, or clucks.
2. 2
   To express by chirping.
3. 3
   To quicken or animate by chirping.

Noun

1. 1
   A series of chirps, clicks or clucks.
2. 2
   A brief, high-pitched, insignificant statement.