better be going

(one had) better be going

Said when one is about to or needs to leave. Well, we had better be going. It was lovely to see you, as always. Better be going before I miss my train!
See also: better, going
Farlex Dictionary of Idioms.

(I'd) better be going.

 and (I'd) better be off.
an expression announcing the need to depart. Bob: Better be going. Got to get home. Bill: Well, if you must, you must. Bye. Fred: It's midnight. I'd better be off. Henry: Okay. Bye, Fred. Henry: Better be off. It's starting to snow. John: Yes, it looks bad out.
See also: better, going
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • (one had) better be going
  • (one had) better get moving
  • better get moving
  • better get on my horse
  • (one had) better get on (one's) horse
  • something
  • he
  • she
  • all the better
  • don't make me say it again