Meaning that it is of no use to dwell on what should have (shoulda), could have (coulda) or would have (woulda) happened/been done.
Said as an attempt to shorten a discussion that focusses on the past, thus providing no solution to an actual problem.
"Man, if only I didn't cum straight in the air, I wouldnt have jizz on my mullet now."
"Shoulda coulda woulda. There are more important things than that. There is more to life than the jizz on your mullet. You're still young, someday you will wash your hair and the jizz will be gone, but your mullet will last forever."
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'