blooper

英 ['bluːpə] 美 ['blupɚ]

blooper (n.): "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.