Cancer Nigger

A person, (most of the times black, but not exclusively,) that is annoying, eats chicken and lives off of everybody's back (welfare, begging etc.). A cancer nigger has no manner and no respect for authority and will likely insult or assault you. They show a low level of intelligence.
The word comes from cancer, the disease, which is often used to describe things or situations that are annoying and from nigger, which is generally a bad person that everyone hates.

Cancer Nigger: *eating chicken*
Person A: YOU CANCER NIGGER STOLE MY MONEY AND MOLESTED MY WIFE!? WHO DO YOU THINK YOU ARE, YOU CANCER NIGGER!!?

Cancer Nigger: Ayo, dats how I be. Dats my biz nigga. Got a problem nigga? Just lemme feast on dem wingz and get outta my way.

cancer hang a nigger trick

Something that white supremacists skinheads do. It involves faking cancer so that the black guy you're approaching doesn't run away, so then you can hang him.

"NOOO DAMN IT! tony fell for the cancer hang a nigger trick."