Zooking means: This was originally from Battlefield 1942. It has been seen again in later Battlefield games that featured aircraft. The pilot who is being chased by a dogfighter will accelerate into a steep 90-degree vertical climb. He/she will exit the aircraft and their velocity will allow them to fly upwards for a brief time. After shooting the enemy from the air, the pilot will then mount an RPGSMAW to climb back in the aircraft. To equip Rocket Launchers, you must be an Engineer. (in Community Dictionary, added by Casey Lyons)