cyanide pill Share definition Flag Also known as a suicide pill, a cyanide pill is known to kill within 30 seconds as it stops the flow of oxygen to your brain Hitler committed suicide by taking a cyanide pill before he shot himself. cyanide pill by arfanrauf November 4, 2009 0 0 Get merch Get the cyanide pill mug. Buy Now — $32.95 See more merch