- INSANE
- Mad
- Moonstruck
- Preposterous
- Bonkers
- Unbelievably high, as a price
- Non compos mentis
- Nuts or bananas
- Cuckoo
- Cuckoo bananas
- X Gamer's "amazing"
- Beyond daring
- Nuts
- Utterly senseless
- Bughouse
- Irrational
- Totally out of the question
- Bats
- Utterly ridiculous
- Completely cuckoo
- Off one's rocker
- Cracked beyond repair?
- Crackers
- Really mad?
- Absurd
- Deranged
- Maniacal
- Wacko
- Bananas, so to speak
- Certifiable
- Like some nuts
- Around the bend, so to speak
- Preposterous, as an idea
- Half-baked
- Off the wall
- Absurd, as a scheme
- Ill-judged, as a plan
- Half-baked, as a plan
- Outrageous
- Unthinkably high-risk, as a plan
- Meshuga
- Ridiculous
- Making no sense
- Utterly illogical
- Extremely ill-advised
- Ludicrous
- Like a fruitcake
- Demented.
- Senseless.
- Impractical.
- Utterly foolish.
- Very foolish.
- Very impractical.
- Extremely foolish
- Foolish
- Lacking logic
- Completely foolish
- Like Van Gogh, at times
- Idiotic
- Adjective for jackassery
- Like Mr. Hyde
- Unreasonable
- Wildly visionary
- Loco
- Loony
- Wacky
- Crazy
- Bananas
- Ready for the rubber room
- Out of one's mind
- Unbelievable
- Fruity
- Irreparably cracked
- Off the hook
- Wild
- Absolutely harebrained
- Certifiable, so to speak
- Off the deep end
- Wildly absurd, colloquially
- Off the hook, so to speak
- Daft
- Lindsey Buckingham "Go ___"
- Not all there
- Cypress Hill hit single "___ in the Brain"
- ___ Clown Posse (duo whose fans are called Juggalos)
- Ready for a commitment?
- Out of one's gourd
- Ready for commitment
- Lacking 46-Across
- Of unsound mind
- Committable?
- Not of sound mind
- Mentally out there
- Completely out of touch
- Harebrained
- Truly mad
- Not playing with a full deck
- A few fries short of a Happy Meal
- Touched and then some
- Cracked
- Like the patients in "Shutter Island"
- Around the bend
- Patently absurd
- Amazing, slangily
- Totally amazing
- Completely implausible
- Laughable
- Outrageous, as an amount of money
- Absurd, as an idea
