subs. (common).Low spirits. See quot. 1754.
1599. NASHE, Lenten Stuffe, in Works (GROSART), v. 267. The sunne was so in his MUMPS vppon it, that it was almost noone before hee could goe to cart that day.
1754. MARTIN, English Dictionary, 2nd ed. MUMPS.
flouts, or ill humour.