When someone has had shit smeared on their chin, so that when they pout they had brown dents on their chin, ootherwise known as a Rusty Chinhole.
Jack: "Hey I saw your girlfriend the other day, she had some massive Rusty Chinhole."
Gus: "Yeah, I gave her a chocolate suprise whilst she was asleep, I had to clean it off quick it almost woke her up."
Jack: "Yeah, I could tell."
Gus: "Solid."