looniest
Craziest of all
Looniest is the superlative form of loony, meaning the most crazy or foolish: That's the looniest idea I've ever heard.
The word derives from lunatic, itself from the old belief that the moon caused madness.
insane
Most mentally unsound
- maddestMost angry or insane
- wildestMost unrestrained or extreme
- nuttiestMost insane or eccentric
- battiestMost eccentric or deranged
daftest · wackiest · zaniest · bonkers · mental · cracked · touched · barmy