l 1 o 1 o 1 n 1 y 4
5 letters · 8 points in Scrabble
Meaning
noun someone deranged and possibly dangerous
adjective informal or slang terms for mentally irregular
originShortened from lunatic, and likely also from loon ("rascal", and also the bird) + -y.
Etymology from Wiktionary, CC BY-SA 3.0