Lyric discussion by CG 

Cover art for Pig Latin lyrics by Dillinger Escape Plan, The

That high-pitched word I hear in the chorus that Patton sings before 'your mother' etc. sounds like 'chinga' to me. 'Chinga' is Spanish for 'screw', and in that particular conjugation, Patton would be urging the listener to screw their mother, father and all the rest.

However, it's quite possible that I'm thinking that because Spanish developed from Latin, and those who see Latin as a superior language might consider Spanish to be 'pig Latin'.