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What does the phrase "Strike a light" mean?
I only found that it is an old exclamation only really heard as a tongue-in-cheek Cockney phrase nowadays.
It is a general exclamation of astonishment, like "Blow me down". There is a remote possibility it is rhyming slang for "sh[ite]", but like so many of these phrases, it is almost impossible to be precise.
phrase - strike a light 
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