How’s it hanging?

How's it hanging?

vulgar slang How are you? "It" refers to the penis. Hey Ben, haven't seen you in a while. How's it hanging?
Farlex Dictionary of Idioms.

How’s it hanging?

verb
See How’re they hanging?
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • (Have you) been OK?
  • on one's
  • on someone's
  • pillow-biter
  • out of one's
  • (I've) got to go
  • #dead
  • save someone's skin
  • knock
  • knock (something)