The man continued to grind his feet against the flinty ground in an attempt to get the mud off of his shoes.

The woman’s flinty heart was as cold as ice, leading her to rarely show emotion.

Both of the boys had flinty attitudes, with tough exteriors that are difficult to break through.

Appearing flinty and cold, the hard-hitting mobster didn’t even cry at his own mother’s funeral.

Tossing a flinty rock at the window, the boy jumped back as he heard the tough hit and glass shatter.