when a motorcyclist rides down the middle of multilane traffic when it is stopped. Is very enjoyable to do in early morning peak hour traffic, much to the frustration of angry car drivers (especially asshole 4wders). When filtering through moving traffic, it is called lane-splitting. Filtering is far less dangerous.
I filtered to work this morning
awesome, how'd that go
great, i cut half an hour of my commute time and i pissed off a lot of bastard cagers