cuckoo for Cocoa Puffs

US not-comparable slang

(US, slang) Crazy, insane, irrational.

Japanese Meaning

狂っている / 正気を失っている / 理不尽な

After spending hours reading conspiracy forums, he became cuckoo for Cocoa Puffs about every minor event.

陰謀論の掲示板を何時間も読んだあと、彼は些細な出来事にも完全に正気を失ってしまった。

Sense（1）

(US, slang) Crazy, insane, irrational.

'She's totally cuckoo for Cocoa Puffs.'