the act of dropping the clutch in a manual transmission car from a standing start, resulting in tyre spin, smoke and tyre marks left on the surface where the "bag-up" was done. Usually done to impress people or as a way of releving anger.
did you see that massive bag-up i did on the way out of the party last night?
To kiss. Can be random or planned, done drunk or sober, at a party or in the movies, can be enjoyable or forgettable.
Usually used : a sleazy suggestive way for a guy to ask a girl if he wants to kiss her. Males usually use this term.. god knows why.