How’re they hanging?

How they hanging?

vulgar slang How are you? "They" refers to the testicles. Hey Ben, haven't seen you in a while. How they hanging?
See also: how
Farlex Dictionary of Idioms.

How(’re) they hanging?

and How’s it hanging?
interrog. an inquiry calling for a report on (1) they, the state of a male’s testicles, (2) it the state of a male’s penis. You’re looking okay. How’re they hanging? Hey, dude! How’s it hanging?
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • (Have you) been OK?
  • on one's
  • on someone's
  • out of one's
  • (I've) got to go
  • save someone's skin
  • knock
  • knock (something)
  • other than
  • other than (something)