(as) tough as nails

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(as) tough as nails

Having physical strength and/or rarely sick or injured. Marty has played in 500 straight games—he's tough as nails. Bert is as tough as nails, so get him to help you move all this furniture!
See also: nail, tough

(as) tough as ˈnails

(informal)
1 very strong and able to deal successfully with difficult conditions or situations: She’s almost 90 but she’s still as tough as nails.
2 not feeling or showing any emotion
See also: nail, tough