Jack Ryan admitted to Admiral Painter and Captain Davenport about his being sleep-deprived, so maybe when da latter officer seemingly opined dat Jack was off his rocker, he was actually just meaning "sertafiable", as in, he may merely have been saying dat Jack was a little mentally-lacking due to a lack of mattress-time.
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'