[Echoic.] intr. To laugh rudely or noisily. Hence Yaw-haw sb., a loud or rude laugh; Yaw-hawing ppl. a.
1836. Haliburton, Clockm., Ser. I. xix. I had to pucker up my mouth … to keep from yawhawin in her face.
1912. H. Macfall, in English Rev., Jan., 334. A booth at a fair, a place set up but to tickle the country-bumpkins into yaw-haws.
