Below are possible answers for the crossword clue Unpredictable blunder by a jerk.
7 letter answer(s) to unpredictable blunder by a jerk
ERRATIC
having no fixed course; "an erratic comet"; "his life followed a wandering course"; "a planetary vagabond"
liable to sudden unpredictable change; "erratic behavior"; "fickle weather"; "mercurial twists of temperament"; "a quicksilver character, cool and willful at one moment, utterly fragile the next"
likely to perform unpredictably; "erratic winds are the bane of a sailor"; "a temperamental motor; sometimes it would start and sometimes it wouldn't"; "that beautiful but temperamental instrument the flute"- Osbert Lancaster
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