- 1. [n, vs, vi] mistake; blunder; bungle; goof (col, uk)
- 2. [n, vs, vi] {mahj} unintentional rule violation accompanied by a penalty (uk)
- 3. [n, vs, vi] {mahj} mistakenly announcing a win without having all the requisite tiles — original meaning (uk, obs)
Conjugation — Noun + する (suru-verb)
| Dictionary form | ちょんぼする | (chonbosuru) |
| Polite | ちょんぼします | (chonboshimasu) |
| Past, plain | ちょんぼした | (chonboshita) |
| Past, polite | ちょんぼしました | (chonboshimashita) |
| Negative, plain | ちょんぼしない | (chonboshinai) |
| Negative, polite | ちょんぼしません | (chonboshimasen) |
| Past negative, plain | ちょんぼしなかった | (chonboshinakatta) |
| Past negative, polite | ちょんぼしませんでした | (chonboshimasendeshita) |
| Te-form | ちょんぼして | (chonboshite) |
| Potential | ちょんぼできる | (chonbodekiru) |
| Volitional | ちょんぼしよう | (chonboshiyou) |
| Conditional (―ba) | ちょんぼすれば | (chonbosureba) |
| Passive | ちょんぼされる | (chonbosareru) |
| Causative | ちょんぼさせる | (chonbosaseru) |
| Imperative | ちょんぼしろ | (chonboshiro) |