Look a gift horse in the mouth

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Origin Reference

The phrase originates from checking a horse's health by looking at its teeth, deemed impolite if the horse is a gift.

Just enjoy the free meal and remember not to look a gift horse in the mouth—it's a kind gesture.

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Cultural Sensitivity

Some cultures may not be familiar with the phrase, so explaining its meaning could be helpful.

When I said 'don't look a gift horse in the mouth,' my international friends didn't understand until I explained.

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Colloquial Usage

It's commonly used in casual conversation rather than formal writing or speech.

He gave you a lift, so don't look a gift horse in the mouth by complaining about his driving.