cack·le 
(k
ăk
əl)
v. cack·led, cack·ling, cack·les
v.intr.1. To make the shrill cry characteristic of a hen after laying an egg.
2. To laugh or talk in a shrill manner.
v.tr. To utter in cackles: cackled a sarcastic reply.
n.1. The act or sound of cackling.
2. Shrill laughter.
3. Foolish chatter.
[Middle English cakelen, probably from Middle Low German kākeln, of imitative origin.]
cackler n.