cupid's disease

NOUN
15 LETTERS · STARTS WITH C

cupid's disease is a valid 15-letter word worth 19 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3U1P3I1D2'0S1D2I1S1E1A1S1E1
3 + 1 + 3 + 1 + 2 + 0 + 1 + 0 + 2 + 1 + 1 + 1 + 1 + 1 + 1 =19 PTS
DOUBLE WORD → 38TRIPLE WORD → 57
MEANING

What does cupid's disease mean?