Used when you're away from your desk, but haven'tgone far - If someone needs you, they should come and find you.
Usually used if there is a chance that you might need to render assistance to someone in a hurry, and your reason for being away is flexible and not so important that you can't leave it or even cancel it altogether.
"I'm awailable - just getting a snack from the kitchen."
"They should still be in the building - they said they were awailable. Probably just chatting with a friend."
"I'm getting some lunch. Seeing as you have that important call, consider me awailable if you need assistance, and I'll come help you out. I'll be down the hall."
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'