What is Iron Knob?
1.
when you masterbate using some sort of lube and it hardens on your dick and you can't get it off so it is permanently hard and you could break someones nose if you turkey slapped them
"broooo he has a stiffy"
"nah mate it's just an iron knob"
"what did he use?"
"honey"
"how long has he had it?"
"2 years"
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