A blending of the terms smoke and break. A smeak may or may not include the taking or making of a personal phone call. A smeak does not coincide with one's scheduled work-related breaks and therefore can be taken at one's convenience.
This in no way can be confused with a break. Therefore, a smeak can be taken every so often as to inhale as much tobacco as possible.
The smeak excuse can be used when coming in late for work or as an excuse for leaving early.
I'm going to go on a smeak. Don't expect me back too soon and I'll probably take another one when I get back.
I'm not late, I was taking a smeak.