diaperboy

The story

1. Proto-Indo-European*dwóh₁
2. Proto-Indo-European*trísinflu.
3. Proto-Indo-European*dwís
4. Ancient Greekδιά (diá)
5. Ancient Greekδια- (dia-)
6. Proto-Indo-European*h₂esp-der.?
7. Latinasper
8. Ancient Greekἄσπρος (áspros)
9. Medieval Greekδίασπρος (díaspros)
10. Medieval Latindiaspra
11. Old Frenchdyapre
12. Middle Englishdyaper
13. Englishdiaper
14. Proto-Indo-European*bʰā-
15. Proto-Germanic*bō-
16. Proto-West Germanic*bōjō
17. Old English*bōia
18. Middle Englishboye
19. Englishboy
20. English todaydiaperboy

From diaper (“an absorbent garment”) + boy (“a human male of any age”). Compare diapergirl. First attested in the form diaper boy on 27 January 1976 in a classified in The Boston Phoenix, and as diaperboy in September 1995 in a classified for the magazine Drummer (see quotations for both).

First known use, by meaning

• 1976 A male diaper lover; a man who engages in ABDL practices.