The Name Game
Find Sir Hammerlock inside Moxxxis. Next, you have to go outside town and search 5 bullymong piles and hunt down 15 bullymongs.
You can use your vehicle weapons to kill them; however you need to smash the bullymong piles with your melee attack to be counted towards the mission. After meeting the first two requirements, you know have to kill a Primal Beast with a grenade.
Know your grenade's fuse time and weaken the target with a few gunshots. Lob a grenade and lure it towards you, just in time the grenade explodes.
Next, you have to shoot an enemy's projectile. Find another group of Ferovores and kill them all except the Slinger. Stay away from it and wait for it to throw rocks at you. Shoot these rocks to update the quest.
Finally, you just need to kill 5 more Bonerfarts to complete the objectives. Return to Sir Hammerlock to complete this task.