Run that by again

Run that by (me) again.

 and Run it by (me) again.
Inf. Please repeat what you just said.; Please go over that one more time. Alice: Do you understand? Sue: No. I really didn't understand what you said. Run that by me again, if you don't mind. John: Put this piece into the longer slot and the remaining piece into the slot on the bottom. Sue: Run that by again. I got lost just after put. Mary: Keep to the right, past the fork in the road, then turn right at the crossroads. Do you follow? Jane: No. Run it by me again.
See also: again, by, run, that
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

Run that by again

verb
See Run that by me again
See also: again, by, run, that
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • Can I get by, please?
  • Could I get by, please?
  • out, please
  • show (oneself) out
  • Pretty please with a cherry on top?
  • Pretty please with sugar on top?
  • as (something) as you please
  • as as you please
  • in the event of
  • in the event of something