Definition of fast and loose
1
: in a reckless or irresponsible manner
played fast and loose with the public purse strings— Paul Stuewe
2
: in a craftily deceitful way
manipulated evidence … and played fast and loose with the truth— C. V. Woodward
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Merriam-Webster unabridged
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Time Traveler for fast and loose
The first known use of fast and loose was in 1557
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