Informal or slang terms for mentally irregular
Around the bend
Balmy
Barmy
Bats
Batty
Bonkers
Buggy
Cracked
Crackers
Daft
Dotty
Fruity
Haywire
Kookie
Kooky
Loco
Loony
Nuts
Nutty
Round the bend
Wacky
Whacky
Insane
Consisting of or covered with or having loops
Loop