Badass, Iron Man, Macho Man, Tough Guy
A man made of iron is a strong man... aka a huge badass. Have you seen "Iron Chef?" The Japanese translation is 料理の鉄人, which means "Chef Iron Man" aka "Chef Badass," at least in my book.
This is a jukugo word, which usually means on'yomi readings from the kanji. Since 人 has two on'yomi readings, here's a mnemonic to help you remember which one to use:
Check out the strong man wearing nothing but jeans (じん). He looks like a badass in his jeans, flexing his pecs. Very impressive, but also slightly terrifying.
Our president is a strong man who comes to work after a triathlon.
This famous female professional wrestler is strong like a badass.
That man is a French chef, who was once also called the "Iron Chef."
I saw a tough guy playing peak-a-boo with a baby in a grocery store.