Meaning

1 senses
  1. (derogatory, offensive, slang)A female marine.

Origin

Humorous alternative explanation for the acronym WM (“woman marine”), implying that she is

Humorous alternative explanation for the acronym WM (“woman marine”), implying that she is hypersexual.

Wiktionary, CC BY-SA 4.0 · source

Forms

plural: walking mattresses

See also

neighbours in the dictionary
walking mattress — meaning, examples, forms, synonyms | Krumeto