bloomer
🇺🇸
/ˈbluːmər/
🇬🇧
/ˈbluːmə(r)/
A simple error or mistake, often amusing.
When he accidentally called the teacher 'mom', it was a real bloomer.
当他不小心把老师叫成‘妈妈’时,那真是一个严重的口误。