swear blind

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swear blind

To make a very serious, solemn pledge, especially that one is telling the truth. Janet has sworn blind that she wasn't the one to betray me, and I believe her.
See also: blind, swear

swear blind

BRITISH or

swear up and down

AMERICAN
If someone swears blind that something is true, they insist that they are telling you the truth. He swore blind that he hadn't taken the money. He swears blind that he bears no grudges against Manchester United for sacking him, but I don't know if I believe him.
See also: blind, swear

swear blind

affirm something in an emphatic manner. British informal
A North American variant of this expression is swear up and down .
See also: blind, swear

swear ˈblind (that)...

(informal) say that something is definitely true: She swore blind that she had not taken the money, and I believe her.
See also: swear
References in periodicals archive ?
He didn't deny what had happened but swore blind he was innocent.
I SEEM to remember that when Reading's Stephen Hunt fractured Petr Cech's skull with his knee, the people who said it just had to be an accident swore blind that Hunt had no track record for this kind of thing.
When he came on for Joe Cole in the second half on Saturday, half the country swore blind he was a Jim'll Fix-It winner.
Terry bailed out within 24 hours and Lee swore blind he had a bad back but, after standing for hours wearing socks on his hands, it turned out there was nothing wrong with him at all.
Ms Lancaster, I'm sure, swore blind some time ago that she was giving up modelling.
It's a line Pauline and Mick must have been forced to swallow thousands of times as she berated herself, swore blind she'd never do it again till finally the heroin-induced euphoria wore off and desperation crept in.
Bob swore blind last year that he and Vic would never swim in the mainstream.
And mentally fit enough to be economical with the truth when he made his original "confession" two months ago and swore blind that he had never fixed matches and that none of his team-mates were involved.
But he swore blind that the abusive language was needed to make sure he'll get the best out of the players on the pitch.
Last August, when details of a pounds 3 million accounting scam became public and Allied's share price went into free-fall, Nethercott swore blind he didn't have a clue about it.