bloomer
🇺🇸
/ˈbluːmər/
🇬🇧
/ˈbluːmə(r)/
A simple error or mistake, often amusing.
When he accidentally called the teacher 'mom', it was a real bloomer.
그가 실수로 선생님을 '엄마'라고 부르는 것은 정말 큰 실수였습니다.