Decamping is where people, in a active gunfight, drive up close to someone in a car, making use of the rules against RDM to make sure they don't get shot in the car (because the other side can't initiate on the car, can't shoot it straight up because it might be RDM or shit RP), then decamp the vehicle and instantly kill the other guy, under the excuse of being involved in the gunfight, because their friends and the guy they decamp on were in a firefight.