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Region: General | Usage example: His rock-solid resume convinced the recruiters.

Rock solid

Meaning

Extremely reliable or stable.

Usage

Used for relationships, data, or plans with no wobbles.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Rock imagery emphasizes unwavering sturdiness.

Used in American English since the early 1900s.

Related Idioms

Between a rock and a hard place

Stuck between two negative options.

Rock the boat

Disturb a stable situation.

It's raining harder than a cow wetting on a flat rock

It is pouring rain.

More Idioms

Break the ice

To do or say something to relieve tension or get conversation going in a social situation.

Cut to the chase

Skip ahead to the most important or exciting part of something.

The ball is in your court

It is now your turn to take action or make a decision.

Throw in the towel

To concede defeat or admit a struggle isn't worth continuing.