To make out with someone extremely hard, so much so that it's like you're eating each other's faces. You can add a comma before heavy just to add extra emphasis, maybe change your tone for it, too.
Yeah man I was walking to class and there was this hallway couple macking face heavy.
A distinct face type that displays square foreheads, defined brow bones , and huuuuuge heads. This face is usually very hard to get rid of genetically as many generations in the same family will have the same distinct look.
Vince Vaughn's heavey face is so pronounced that it makes George Lopez look like a pin-head.
Cigarette: Northern slang for a cigarette, used oft by mashed up mancunian ravers becasue of the resemblance of a hot(electric)stove to the end of a lit cigarette. Originated circa 1991 in the early halcyon days of the rave culture; we speculate during a drug fuelled hallucination by said manc.
'fuck me noel, i am bolloxed, is that a ciggy in your mouth, or the stove from me 'nans kitchen'/
General use: 'Give us a stove you cunt'