# wacko

> English word · Adjective · IPA /ˈwæ.kəʊ/ · frequency rank #61,206

## Definitions
1. Amusingly eccentric or irrational.

## Etymology
From wack(y) + -o.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/wacko