2) To operate a motor vehicle in a spirited fashion.
3) To commence, or return, fire at a person or thing.
2) Yeah, just a few minutes ago, we had 'em opened up out there on Redwood.
3) Why don't we take the 1911 out and open up on some bottles and cans?
The opening process can be as simple as a minor poke but generally involves heavy bleeding and multiple openings. The more insane openings consist of using your bear hands/fingers to perform the opening process.