[Imitative.] a. A half-suppressed laugh. b. A sharp squeaking sound.

1

1882.  ‘F. Anstey,’ Vice Versâ, iv. 64. Little gurgles and ‘squirks’ of laughter.

2

1902.  P. Fountain, Mts. & Forests S. Amer., ix. 260. [A thrush] occasionally uttering a squirk to attract my attention.

3