(noun): When a woman, typically promiscuous by nature, lusts after more than one penis; when a woman is not satisfied by a single penis and must have as many as possible.
Dick Greed is about wanting all the dicks, to be the Scrooge McDuck of dicks, as it were.
Yo that ho triflin. She wants Kanye West's dick AND Ray J's dick! She got that dick greed!