I tell you

Related to I tell you: roughshod, I Guess, pale in comparison, so much for

I tell you

1. A phrase emphasizing that the speaker is about to present their opinion on something. I tell you, this burger might be the best I've ever had.
2. I assure you; please listen to what I am saying because it is important. You've got the wrong man, I tell you!
See also: tell
Farlex Dictionary of Idioms.

I ˈtell you

,

I can ˈtell you

,

I’m ˈtelling you

,

I can’t ˈtell you how, etc. ...

(spoken) used to emphasize what you are saying, especially when it is surprising or difficult to believe: It’s not as easy as it looks, I’m telling you. I can’t tell you how happy I felt (= it is difficult to describe my happiness, because it was so great).
See also: tell
Farlex Partner Idioms Dictionary
See also:
  • I/I'll tell you what
  • tell you what
  • I'll tell you
  • after meat, mustard
  • (as) sure as eggs (is eggs)
  • young once
  • you're only young once
  • fair's fair
  • (one's) best foot forward
  • best foot forward