any Tom, Dick, or Harry

any Tom, Dick, or Harry

Any common, undistinguished person; anyone at all, indiscriminately. You don't want any Tom, Dick, or Harry coming to your performance, but then you don't want to limit the amount of business you might bring in, either. Kate's being very selective as to who gets invited to the wedding, as she doesn't want just any Tom, Dick, or Harry turning up.
See also: any, harry
Farlex Dictionary of Idioms.

every/any ˌTom, ˌDick and/or ˈHarry

(usually disapproving) any ordinary person; people of no special value to you: We don’t want just any Tom, Dick or Harry marrying our daughter.
See also: and, any, dick, every, harry
Farlex Partner Idioms Dictionary
See also:
  • (I) won't tell a soul
  • cast (one's) lot in with (someone or something)
  • cast lot in
  • don't get me wrong
  • don't beat a dead horse
  • all in (one's) head
  • (someone's) secret is safe with (one)
  • come it
  • come it (with one)