loony 1
— looniness , n.
/looh"nee/ , adj., loonier, looniest , n. , pl. loonies . Informal.
adj.
1. lunatic; insane.
2. extremely or senselessly foolish.
n.
3. a lunatic.
Also, looney, luny .
[ 1860-65; LUN(ATIC) + -Y 2 ]
loony 2
/looh"nee/ , n. , pl. loonies .
loonie.