zipper-problemhttp://www.oed.com/dictionary/zipper-problem_n%3Ftab%3Dmeaning_and_usezipper problem, n.
First published 2021

zipper problemnoun

euphemistic (originally U.S.).
  1. 1985–
    (With reference to a man) a habit of sexual promiscuity or infidelity.
    The expression is often used in the context of (alleged) sexual misconduct by male public figures, gaining prominence in the 1990s in relation to accusations against Bill Clinton, U.S. President 1993–2001 (cf. quot. 1999).
    1. 1985
      [He] had gotten the boot from Koch for alleged incompetence, excessive debauchery and an alleged ‘zipper problem’.
      New York Amsterdam News 31 August 3/1
    2. 1999
      How did a president's zipper problem become a constitutional crisis?
      Gazette (Cedar Rapids, Iowa) 4 February 2a/1
    3. 2010
      Matt was an up-and-coming political journalist who everyone..knew had a major zipper problem.
      J. Collins, Poor Little Bitch Girl ii. 11

Originally published as part of the entry for zipper, n.

zipper problem, n. was first published in 2021.