blooper (n.)youdaoicibaDictYouDict[blooper 词源字典]
"blunder," 1943, apparently first in theater, from American English baseball slang meaning "a fly ball in a high arc missed by the fielder" (1937) or else from the earlier sense "radio receiver that interferes with nearby sets" when a careless operator throws it into oscillation (1926), in which case it imitates the resulting sound.[blooper etymology, blooper origin, 英语词源]