EXAMPLES FROM THE WEB FOR GIGGLE
“Yes,” said I, and all the boys began to giggle as if something clever had been said.
Then he began to giggle because her bare shoulders were right under his nose.
And that would be Etta's hint to look cute and giggle and say, 'Well!
Bessy began to giggle and to move herself about in a very uneasy way.
They could giggle, and nudge and comment like girls together, and did.
The giggle proved infectious and went the round of the table.
If they did not giggle sometimes, you might think that they were dolls of wax or china.
Which was where you'd expect her to turn pink in the ears and let loose a giggle.
His gentle snore arose on the air, and Mucluc Charley began to giggle.
It seemed to him that the maid had the air of one about to giggle.
c.1500, probably imitative. Related: Giggled; giggling; giggly. As a noun from 1570s.