A member of an opposing gang that has killed one of your homies in the past. Although your first instinct is to exact revenge on that motherfucker, you are aware that it may ignite another gang war. Gang wars, although hilarious and fun, are not desired by the warlords in the ghetto because they attract attention to the underworld from Whitey and/or "The Man." Quite often, you are a Chan Tigah to someone else because you gunned down his cousin at the taco stand. The huge number of Chan Tigahs in the Ghetto is what sociologists refer to as "Street Brinkmanship," meaning, since everyone has Chan Tigah status, no one can kill anyone for fear of starting a huge gang war.
A Chan Tigah is a politically complex term for an enemy that you want to kill but can't.
I wanted to kill that motherfucker chan tigah last night in the back alley, but "Five Tooth Tre Dog" told me to wait until the heat was off.