I tell a lie - Idioms by The Free Dictionary
I tell a lie
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I tell a lie BRITISH
People sometimes say I tell a lie when they have just made a mistake in something that they are saying and immediately correct it. It's in the first scene of the play. I tell a lie, it's actually in the second scene.
I tell a lie (or that's a lie) an expression used to immediately correct yourself when you realize that you have made an incorrect remark. informal
I tell a ˈlie (spoken) used to say that something you have just said is not true or correct: We first met in 1982, no, I tell a lie, it was 1983.