make a laughingstock

He undoubtedly worked with von Papen and Boy-Ed during the early years of the war—years in which this precious trio, either with or without the knowledge of Count von Bernstorff, sought by every means to cripple American shipping, violate American neutrality, and make a laughingstock of American diplomatic methods.

If he could get those stones, he’d not only have a handsome profit, he’d make a laughingstock of me—what he has sworn to do.

"Now, Rose, if you will just coach him a little in his small talk, he won't make a laughingstock of himself as he did the other night," added Steve.