Meaning of the word "hit or miss" in English

What does "hit or miss" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

hit or miss

US /hɪt ɔr mɪs/
UK /hɪt ɔː mɪs/

Idiom

unpredictable; sometimes good and sometimes bad

Example:
The quality of the food at that restaurant is really hit or miss.
His performances can be a bit hit or miss, depending on the day.