Tough as mails

I think you meant to say "tough as nails"!

"Tough as nails" is an idiomatic expression that means someone or something is extremely resilient, strong, and able to withstand difficult situations or challenges. It's often used to describe someone who is brave, determined, and able to overcome obstacles.

For example:

• "She's tough as nails and can handle any situation that comes her way."
• "The team was tough as nails and fought hard to win the championship."

The phrase is thought to have originated from the idea that nails are strong and resistant to bending or breaking, much like someone who is tough as nails is resistant to adversity.