jest at

VERB
7 LETTERS · STARTS WITH J

jest at is a valid 7-letter word worth 13 points in Scrabble and 15 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
J8E1S1T1A1T1
8 + 1 + 1 + 1 + 0 + 1 + 1 =13 PTS
DOUBLE WORD → 26TRIPLE WORD → 39
MEANING

What does jest at mean?