The word house nigga has numerous definitions.
1. a black person who acts like someone from the suburbs, essentially a black person who acts white but tries to be black.
2. a black person that serves white people.
house nigga is derived from slave times when the slave who worked inside the house and sucked up to the slave master was referred to as the "house nigga"
"yo did you see lenny dancing at that party last night"
"yeah they rented him for that music video, straight up rental black man, fuckin house nigga!"
A lazy mutha fucker who dont wanna leave the house dont wanna do nothing but hang at there house and can only come out on friday nights.. regardless of ethnicity