tell you what

tell you what

A phrase indicating that the speaker is going to present a suggestion or their opinion on something. I tell you what, this burger might be the best I've ever had. Tell you what, why don't you go out for a run and I'll watch the kids for a while. I'll tell you what, that was some concert.
See also: tell, what
Farlex Dictionary of Idioms.

I/I’ll ˌtell you ˈwhat

,

ˌI know ˈwhat

(spoken) said before making a suggestion: I tell you what — let’s ask Fred to lend us his car. I know what! Why don’t you buy her a CD?
See also: tell, what
Farlex Partner Idioms Dictionary
See also:
  • I/I'll tell you what
  • I tell you
  • (as) sure as eggs (is eggs)
  • beck and call
  • going, going, gone
  • going, going, gone!
  • how about
  • how/what about...?
  • eggs is eggs
  • (one's) best foot forward
References in classic literature
I wish I were with you, dear, sitting by the fire undressing, as we used to sit, and I would try to tell you what I feel.
Dear Mr Clennam, as I had the courage to tell you what the familiar difficulties in my travelling mind were before, I will not be a coward now.
The bird replied, "My good master, the lightning, thunder and rain disturbed me so much all night long, that I cannot tell you what I have suffered."
All we have any right to do is to tell you what the doctor says.
We asked GL readers for their most common BFF conversation quandaries, and we're right here to tell you what to say to your best friend when ...
The guy says quietly, Listen, your dad told me that he told you about Hurtgen, and I know this isn't the time or place to tell you what else happened that day, but I'd like to talk to you, whereas I don't have any kids and I am not going to live forever, and you young people should know some things, you know?
* Empathy--reading other people's emotions without their having to tell you what they're feeling.