When a girl (or a guy) goes out with someone significantly older than them with significantly more money than they have. Commonly done in the hopes that they pass away and leave you with the loot. A bit like a gold digger but with less morals and more purpose.
The morbid act of looting a recently fired employees office to get all their cool stuff that was left behind. Usually done in a secretive manner after other employees have left the office.
Bob: Where is Mike?
Kevin: He is grave robbing Jack's office... he needs a new monitor and it's not like that jobless ass needs it anymore!!
A Grave Robbing Nigga is a member of the black community who tries to profit off from high-profile cases of social injustice by creating schemes and crowdfunds for his or hers own enrichment without remorse or shame.
Man, did that thot really run away with all the BLM money generated from George Floyd?
Yea, she's a real Grave Robbing Nigga(Nigress).