This is by far the hardest achievement in the second season. It is strongly recommended that you get this in the second mini game since you will see far fewer chunks of meat. To unlock this, you will need to get everything that is thrown, not missing even a single chunk from the small groups. You can have things missed and still in the air as time runs out, but nothing can hit the water without being eaten.
Unlike in other minigames, you are better off standing back from Kinect since the area of the screen that you have to get the meat to seems like it is the same size regardless of how large your head is on the screen. If you are close, you are quite likely to have the meat just slip through your jaws. You are going to need to move quickly and accurately, but the biggest issues are the groups of meat chunks. If you can, try and move your head back and forth along the line of the group to ensure that nothing is missed. You might also be able to delay the arrival of the groups of chunks by making sure that you do not eat the early chunks until they are close to leaving the screen. However, this can lead to more misses if you are not careful, since the large pieces fall very quickly and are easy to miss.