loony

adj : informal or slang terms for mentally irregular [syn: {balmy},

{barmy}, {bats}, {batty}, {bonkers}, {buggy}, {cracked},

{crackers}, {daft}, {dotty}, {fruity}, {haywire}, {kooky},

{kookie}, {loco}, {loopy}, {nuts}, {nutty}, {wacky}]

n : someone deranged and possibly dangerous [syn: {crazy}, {looney},

{weirdo}]