mischief-maker

NOUN /mɪsʧɪf_,meɪkər/
14 LETTERS · 3 SYLLABLES · STARTS WITH M

mischief-maker is a valid 14-letter word worth 29 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
M3I1S1C3H4I1E1F4-0M3A1K5E1R1
3 + 1 + 1 + 3 + 4 + 1 + 1 + 4 + 0 + 3 + 1 + 5 + 1 + 1 =29 PTS
DOUBLE WORD → 58TRIPLE WORD → 87
MEANING

What does mischief-maker mean?