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Schoolboy error Meaning in English

expression

ˈskuɫˌbɔɪ/ /ˈɛɹɝ
SKOOL-boy ERR-ur
skˈuːlbɔɪ/ /ˈɛɹɐ
SKOOL-boy ERR-uh

Definition

A simple mistake that someone should not make, especially because it’s something that beginners or young students might do.

Usage & Nuances

This is informal and often used to criticize avoidable mistakes, especially by professionals. Common collocation: 'That was a schoolboy error.' Not literally about schoolboys—applies to anyone making an obvious mistake.

Example Sentences

He made a schoolboy error on his first day at work.

basic

Leaving the door unlocked was a schoolboy error.

basic

Forgetting to save the file was a schoolboy error.

basic

That missed goal was a total schoolboy error from the striker.

natural

Come on, that’s a schoolboy error! You should know better.

natural

Even experts sometimes slip up and make a schoolboy error.

natural