Hop off my johnson means in a different phrase "get off my case". Used mostly when youre just joking around with your friends but can also be used when trying to get someone thats attempting (and probably failing harshly) to tell you off. They get confused, you walk out feeling good that you got away from that.
Person 1: "I bet you've never even been kissed before, have you?"
Person 2: "Hop off my johnson!"
*person 2 walks out while person 1 is still in a state of confusion.
The term is used when a person has loaded a Sniper and is going to shoot someone in the head. Originally meaning to elect Lyndon B. Johnson as president.
"HeyDickhead, don't let my ass see you putting Lyndon B. Johnson into office
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'