“Cost an arm and a leg”
What it really means, explained simply for children who take language literally.
What the words say
You pay with your arm and your leg.
What it really means
Being very expensive.
Example
That new bike costs an arm and a leg.
Sayings like this one do not mean what the words say. For a child who reads language literally, common with hyperlexia and autism, that hidden second meaning can be confusing or even worrying. Our free Idiom Explainer shows the literal picture and the real meaning side by side, so the next saying meets curiosity instead of worry. It runs in your browser, nothing is sent anywhere.