1. (adjective) informal or slang terms for mentally irregular

• around the bend
• balmy
• barmy
• bats
• batty
• bonkers
• buggy
• cracked
• crackers
• daft
• fruity
• haywire
• kookie
• kooky
• loco
• loony
• loopy
• nuts
• nutty
• round the bend
• wacky
• whacky

2. (adjective) intensely enthusiastic about or preoccupied with

• crazy
• gaga
• wild

1. (adjective) informal or slang terms for mentally irregular

• insane

2. (adjective) intensely enthusiastic about or preoccupied with

• enthusiastic

1. (adjective) informal or slang terms for mentally irregular

• addle-head
• addlehead
• birdbrain
• loon
• craziness
• daftness
• flakiness
• kook
• odd fellow
• odd fish
• odd man out
• queer bird
• queer duck

2. (adjective) intensely enthusiastic about or preoccupied with

• craze
• cult
• fad
• furor
• furore
• rage
• craziness
• folly
• foolishness
• madness