Originally a word for Imitation Crack-Cocaine made with chunks of soap a person would go to buy crack and get ripped off; which lead to the word meaning, "To Steal or Rip Someone off"; Which lead to Gank meaning "Kill Someone" (i.e. Taking/Stealing someones life). Now-a-days retards use it for everything I guess (Orgasm, Marijuana, Penis, etc), which became clear when I stumbled upon 41 (!) different definitions for Gank that have nothing to do with Imitation Crack. IT MEANS BOOTLEG CRACK! That's My word!
"I was smoking some Endo the other day when the Crack dripped done the pipe and nearly choked me to death, that nigger sold me Gank!"