Extremely simple: hard as fuck.
Adjective.
Most often used as a compliment of people who seem tougher or more weathered than others.
"All of us in suits man? We would look hard af"
"Dude, we are hard af in this"
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Referring to ones penis when erect.
"Dude, I took a Viagra last night and my dick
Was hard af, no joke.,
Reply..."hard as 'blue' steel?!" (because Viagra's are blue pills)
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