Guffaw at - Idioms by The Free Dictionary
guffaw at someone or something
to laugh at someone or something very hard and raucously. The audience guffawed at the clown's antics. The old man guffawed at the clown.
References in periodicals archive
While some might guffaw at
a lot of the situations that go on around the sets depicted in The Fluffer, I just nodded in agreement with the truth of it all.