late 14c., "heated till it glows red" (of metal, etc.); of persons, "lively, passionate," it is recorded from c. 1600. Red-hot mama is 1926, jazz slang, "earthy female singer," also "girlfriend, lover."
a red-hot mama
red-hot information
a red-hot speech
a red-hot line drive
redevelopment
red-eye
redfish
red-handed
redhead
red-hot
redial
redingote
redirect
rediscover
rediscovery
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