pähkähullu

Etymology
🇰🇲; see

Adjective

 * 1) raving mad, mad as a hatter, insane
 * Hänen vaimo piti koko hanketta aluksi pähkähulluna.
 * His wife considered the whole project completely insane in the beginning.

Noun

 * 1) A raving mad person

Synonyms

 * (milder)