better get on my horse

(one had) better get on (one's) horse

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

(I'd) better get on my horse.

Inf. an expression indicating that it is time that one departed. John: It's getting late. Better get on my horse. Rachel: Have a safe trip. See you tomorrow. "I'd better get on my horse. Thesun'll be down in an hour," said Sue, sounding like a cowboy.
See also: better, get, horse, on
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • (one had) better get on (one's) horse
  • (one had) better get moving
  • better get moving
  • (one had) better be going
  • better be going
  • he
  • she
  • they
  • all the better
  • so much the better