/ dræt; NAmE / exclamation
( old-fashioned , informal ) used to show that you are annoyed :
Drat! I forgot my key.
► drat·ted adjective [ only before noun ] ( old-fashioned , BrE , informal ):
This dratted pen won't work.
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WORD ORIGIN
early 19th cent.: shortening of od rat , euphemism for God rot .