giggle at

giggle at (someone or something)

To utter a short laugh elicited by someone or something. I giggled at the baby's attempts to grab her feet. We giggled at the professor when his voice cracked, then quickly hid our faces when other people turned around to look at us.
See also: giggle

giggle at someone or something

to snicker or chuckle at someone or something. Are you giggling at me? Fran giggled at the antics of the clown.
See also: giggle
References in classic literature ?
No girl that ever lived should giggle at him, much less lock him up like a small child.
I giggle at daft things and it doesn't take much to set me off.