Drat is defined as a way to express being upset or irritated.
(interjection)An example of drat is what you'd say after finding out you have to go into work on your day off because someone called in sick.
See drat in Webster's New World College Dictionary
interjection
Origin: aphetic < 'od rot < God rot
See drat in American Heritage Dictionary 4
interjection
Origin:
Origin: Short for God rot
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