8 letters · 18 points in Scrabble
noun a whimsically eccentric person
originMostly likely a back-etymology of pot, to form crack + pot. Originally, from crack + pate. Compare typologically Russian чо́кнутый (čóknutyj) (< чо́каться (čókatʹsja), onomatopoeic), see crack for the further typology.
Etymology from Wiktionary, CC BY-SA 3.0