From WordNet (r) 2.0 (August 2003) [wn]:
barmy
adj 1: marked by spirited enjoyment [syn: zestful, yeasty,
zesty]
2: informal or slang terms for mentally irregular; "it used to
drive my husband balmy" [syn: balmy, bats, batty,
bonkers, buggy, cracked, crackers, daft,
dotty, fruity, haywire, kooky, kookie, loco,
loony, loopy, nuts, nutty, round the bend,
around the bend, wacky, whacky]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Barmy \Barm"y\ (b[aum]rm"[y^]), a.
Full of barm or froth; in a ferment. "Barmy beer." --Dryden.
[1913 Webster]