adjective, barm·i·er, barm·i·est.
- containing or resembling barm; frothy.
- British Slang. balmy(def 4).
adjective -mier or -miest
- slang eccentric or foolishAlso: balmy
1530s, “frothing, covered with barm;” see barm + -y (2). Figurative sense of “excited, flighty, bubbling with excitement” is from c.1600. Meaning “foolish” (1892) is probably an alteration of balmy.