How many times do I have to tell you?

How many times do I have to tell you?

Why do I have to keep reminding you about (something)? Typically said in annoyance or frustration. How many times do I have to tell you? Don't leave your wet towels on the floor! You need to put out the trash on Tuesday mornings—how many times do I have to tell you?
See also: have, how, many, tell, times
Farlex Dictionary of Idioms.

How many times do I have to tell you?

Inf. a phrase admonishing someone who has forgotten instructions. Mother: How many times do I have to tell you? Do your homework! Bill: Mom! I hate school! Mary: Clean this place up! How many times do I have to tell you? Bill: I'll do it! I'll do it!
See also: have, how, many, tell, times
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • It sucks
  • it/that sucks
  • DGAF
  • a bone to pick
  • a crow to pluck
  • be a thorn in (one's) side
  • be a thorn in your flesh/side
  • a thorn in (one's) side
  • a thorn in someone's side
  • a thorn in your side