They left the strip club when they discovered the ladies only stripped down to their nylons.
Origin of nylon
- Coined by its inventors, E.I. Du Pont de Nemours and Co., Inc., on the model of cotton rayon etc
From American Heritage Dictionary of the English Language, 5th Edition
- Arbitrary letters + -on (by analogy with cotton); the frequently heard claim that the word derives from abbreviations of New York ("NY") and London ("Lon") is a myth.