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. The phrase goes back to about 1987.
- No Laughing Matter: Failing the Giggle Test Might Leave You Crying, ABA Journal, Nov 01, 2011. Accessed 05/30/2015.