Straight face test

The straight face test (also laugh test or giggle test) is a test of whether something is legitimate or serious based on whether a given statement or legal argument can be made sincerely, without any compulsion to laugh.{{cite journal |last= McElhaney |first= James W. |title= The Giggle Test |journal= ABA Journal |date= October 1, 1988 |pages= 90, 92 }} The phrase goes back to about 1987.[http://www.wordspy.com/words/giggletest.asp WordSpy]