The true name of this achievement is "Pork Royale"
The official objective is the following :
"In the Slaughterhouse job, find the marked pig, secure it in the container and then finish the heist on OVERKILL or above."
It's not a hard one, but it's an important one if you like skins in Payday2, because it will give you a totally free safe AND drill! It only works only once and it's only available for 30 days! So be hurry to achieve this: it's a free content and it can be great to get a free skin in game!