Most easily done at the end of the game, when your stamina meter is as high as possible. The general theory is simply to find an enemy with a shield that the chicken can't break, then keep it in the air with Pollo Slide over and over again.
If you can't find one, and you're at the end of the game, try the Proving Grounds (from Villachula, go left to the Badlands and immediately up to the Proving Grounds). The middle door on the second level requires you to have your "Fury Fighting" tree maxed out (Flame Face skills). The first enemy room is a bunch of easy enemies with blue shields. You can slide back and forth until your stamina runs out. I did it with all the enemies still alive, just slide and watch a particular one. Try to hit it just before it touches the floor; six times in a row and you'll have your achievement.
EDIT: FYI, don't hit those enemies with an actual damage-dealing attack. That will begin the challenge and you'll die when your counter expires.