bloop·er
noun/ˈbluːpə(r)/
/ˈbluːpər/
(especially North American English)- an embarrassing mistake that you make in public
当众出的洋相；出丑 Word Origin1926 (originally US, denoting a radio which caused others to bloop, i.e. emit a loud howling noise): from imitative bloop + -er.