I'll tell you

I'll tell you

1. non-idiomatic I will simply state it. You don't need to guess. I'll tell you. My middle name is Marvin.
2. A phrase emphasizing that the speaker is about to present a thought or their opinion on something. I'll tell you, this burger might be the best I've ever hard.
See also: tell
References in classic literature ?
Now, Miss Grey,' exclaimed Miss Murray, immediately I entered the schoolroom, after having taken off my outdoor garments, upon returning from my four weeks' recreation, 'Now--shut the door, and sit down, and I'll tell you all about the ball.
I'll tell you exactly what you've got to do, and you needn't think you're going to do anything else.
If you care for my profession of faith as regards that, I'll tell you that I don't believe there was any tragedy about it.
No, it's something I'll tell you about by-and-by, not yet," said Tom, skipping away.
But I'll tell you what I do see, Arthur,' glancing up at the windows; 'I see the light of fire and candle in your mother's room
Now listen, and I'll tell you something: the day may come when the lions get sick.
Tell me what you know about him, and I'll tell you how my father came to be his executor, and more besides.
Now I'll tell you something more, wolf, and this ends it.
I'll tell you what I knows, I knows enough to bu'st dat will to flinders--en more, mind you, more
But I'll tell you what,' he said, 'if there is such a place on earth at all, I have a brother who lives nine hundred miles from here, and he is sure to know where they are, if anyone in this world does.
It's my belief neither of you gentlemen know what you are about, but I'll tell you my way of it-- life or death, and a close run.
Looky here, Huck, I'll tell you one thing that's mighty curious.
Your mind will be all the better for not running on one point too continually, and I'll tell you for a change.
Add five pounds to the sum you have named; give me five-and-twenty pounds in gold,' said the woman; 'and I'll tell you all I know.
Now take your tea,' said she; 'and I'll tell you what I've been doing.