A magical incantation which is uttered at the start of a sentence to impart substance and credibility to the rest of the sentence. It is used to exempt the speaker from accepting personal responsibility for a situation or changing his/her viewpoint on an issue.
Alice: Tina, if you want to lose all that weight you really have to cut down on those cheesecakes.
Tina: Yebbit I've been going to the gym a couple of times a month, and I've tried dieting before but my metabolism just holds the weight on me no matter what I eat.
When you are saying "Yes, but" faster trying to get your point befor your dad or mom or whoever says no.
"Can you take us to the moviesright now?"
"No I have work tomorrow and i need to get up early."
"Yeabut it will just be really fast you can just drop us off."
"Ugh.. ok.."