swear blind...
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.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
swear ˈblind (that)...
(informal) say that something is definitely true: She swore blind that she had not taken the money, and I believe her.Farlex Partner Idioms Dictionary © Farlex 2017
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