gibberish

NOUN /dʒɪbərɪʃ/
9 LETTERS · 3 SYLLABLES · STARTS WITH G

gibberish is a valid 9-letter word worth 17 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
G2I1B3B3E1R1I1S1H4
2 + 1 + 3 + 3 + 1 + 1 + 1 + 1 + 4 =17 PTS
DOUBLE WORD → 34TRIPLE WORD → 51
MEANING

What does gibberish mean?