maypole (plural maypoles)

1. A pole, garlanded with streamers held by people who dance around it to celebrate May Day.
2. (euphemistic) A penis, especially a large one.
   • 1749, [John Cleland], “(Please specify the letter or volume)”, in Memoirs of a Woman of Pleasure [Fanny Hill], London: Printed [by Thomas Parker] for G. Fenton [i.e., Fenton and Ralph Griffiths] […], OCLC 731622352 ↗:

     and now, disengag'd from the shirt, I saw, with wonder and surprise, what? not the play-thing of a boy, not the weapon of a man, but a maypole of so enormous a standard, that had proportions been observ'd, it must have belong'd to a young giant.

• French: arbre de mai
• German: Maibaum