strap-off

• strapoff

From strap +‎ off, modeled after strap-on.

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strap-off (plural strap-offs)

1. (transgender slang) The penis of a trans woman.

   Synonyms: see Thesaurus:trans woman's penis

• Fielding, Lucie (2021) Trans Sex: Clinical Approaches to Trans Sexualities and Erotic Embodiments, New York: Routledge, →ISBN, page 96