☞ Many people have made use of, or invented, units of measurement intended primarily for their humor value. This is a list of such units invented by sources that are notable for reasons other than having made the unit itself, and that are widely known in the Anglophone world for their humor value.

Hawking Index (reading capacity)

Invented by mathematician Jordan Ellenberg, the Hawking Index (HI) is the percentage of a book’s readers who will finish it. Books with a lower HI are less likely to be completed. It is named after Stephen Hawking, whose book A Brief History of Time scores 6.6% on the scale.

Muggeseggele

A Muggeseggele is a humorous Alemannic German idiom used in Swabia to designate a nonspecific very small length or amount of something; it refers to a housefly’s scrotum.