The intense burning feeling you get during urination after you've blown so many loads that you canna' blow no more son
Primo: "Were you ok when you got home last night? You were sooo drunk, lucky my sister was able to give you a lift"
Secundo: "I don't remember man but I had the worst razor blades when I woke up this morning"
A favorite tool of cutters and cokeheads, razor blades are often used to cut drugs into powder or to slice one's flesh when cutting.
Pass me the razor blades, man. My nose needs a treat!