expression, noun
careless mistake; silly error; blunder
A casual, often self-deprecating term for a mistake made through inattention or a momentary lapse, common in workplace and everyday contexts.
またポカミスをしてしまった。
I made another careless mistake.
ポカミスで書類を二重に送ってしまった。
I accidentally sent the documents twice because of a silly error.