also: むしがよい
虫がいい · i-adjective (yoi/ii class)
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 虫がいい | 虫がよくない |
| Polite | 虫がいいです | 虫がよくないですalso 虫がよくありません |
| Past polite | 虫がよかったです | 虫がよくなかったですalso 虫がよくありませんでした |
| Past | 虫がよかった | 虫がよくなかった |
| Te-form | 虫がよくて | 虫がよくなくて |
| Adverbial | 虫がよく | |
| Conditional | 虫がよければ | 虫がよくなければ |
| Tara conditional | 虫がよかったら | 虫がよくなかったら |
expression, i-adjective (yoi/ii class)
selfish; presumptuous; asking too much
Describes a person who is self-centered or makes unreasonable demands, often without considering others. The phrase literally means 'the bug is good,' referring to an inner selfish nature.
See also: 虫のいい
He's selfish, so he always thinks only about himself.
Such a presumptuous proposal won't be accepted.
身勝手 is a plain adjective meaning 'self-centered', whereas 虫がいい is an idiomatic phrase specifically about making unreasonable demands on others.
自分勝手 describes general selfish behavior in daily life, while 虫がいい more pointedly criticizes someone for expecting unfair favors.
図々しい emphasizes shameless boldness in asking or acting, while 虫がいい focuses on the unfairness of the selfish request itself.
Standard kanji spelling; the reading むしがいい is the most common.
Alternate spelling using 良い; the reading むしがよい is also used, though less common.
Search-only form; not a standard written variant.
虫 here reflects the traditional figurative sense of an inner impulse or disposition. 虫がいい describes that impulse as operating conveniently for oneself, hence “self-serving” or “presumptuous.”