(North America, vulgar, usually, derogatory, offensive, or, ABDL, endearing) A diaper lover, especially a man (a diaperboy).
Stuffed animals with diapers on are not considered "friends", diaperfag.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.