be (as) hard as nails

To be physically or mentally tough. I'm scared of those bikers—they all look like they're hard as nails! Our aunt is as hard as nails, so we asked her to give the eulogy, knowing that she's the only one who could do it without crying.

Common Names:

Name	Pronounced	Usage
Logan	LO-gən	Scottish, English
Uinseann	-	Irish
Nanna (1)	NAN-nah (Danish), NAHN-nah (Swedish, Norwegian, Icelandic)	Danish, Swedish, Norwegian, Icelandic, Norse Mythology
Filippa	fee-LIP-pah (Swedish)	Russian, Greek, Swedish, Italian
Kyrillos	-	Ancient Greek
Sixten	-	Swedish