- To treat (a metal surface) with cyanide to produce a hard surface.
- To treat (an ore) with cyanide to extract gold or silver.
Person with brain: "OMG you should blow a line of cyanide."
Warning: Due to the amazing effects of Cyanide, this should only be taken by those who value their lives and wish to live a long happy life.
Side-effects include, loss of breath, drowsiness, fatigue, inability to get a hard on, low sperm count, discoloration of the skin with prolonged use, loss of hair, loss of flesh, loss of brain matter, limbs unexpectedly detach from the body, inability to feel human emotions, craving for the consumption of human brains, disorientated motor skills, loss of a heart beat, coagulation of the blood, limited muscle movement, calcification of the feet and hands, and uncontrollable bowel movements.