Meaning of the word "split hairs" in English

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

split hairs

US /splɪt hɛrz/
UK /splɪt hɛərz/
"split hairs" picture

Idiom

to argue about very small differences or unimportant details

Example:
Let's not split hairs over who paid for the coffee; it's a small amount.
He's always splitting hairs in every discussion, making it hard to reach a conclusion.