Two meanings:
1)When a girl or gay guy put cheese in his/her mouth with a hole just big enough for a dick to fit through, and then sucks of there man.
2) When a guy covers his dick with cheese and then gets head, also known as cheese job
Person 1: aye bro we outside today?
Person 2: nah bro i got a gf now.
Person 1: who?
Person 2: my ex
Person 1: you talm bout the hoe that cheated on you?
Person 2: yeah man i got back with with her.
Person 1: man dawg you a true cheese head.