upsetting thermometer

21 LETTERS · STARTS WITH U

upsetting thermometer is a valid 21-letter word worth 30 points in Scrabble and 35 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

U1P3S1E1T1T1I1N1G2T1H4E1R1M3O1M3E1T1E1R1

1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 2 + 0 + 1 + 4 + 1 + 1 + 3 + 1 + 3 + 1 + 1 + 1 + 1 =30 PTS

DOUBLE WORD → 60TRIPLE WORD → 90

MEANING

What does upsetting thermometer mean?