May-Yah Kool-Pah Sed Too Kwo-Kway Add Max-Ih-Mum
Idiotically ungrammatical Latin bastardisation, roughly "I may be guilty, but you are considerably more guilty."
Handy, highly conditional argumentative tool used to disguise the fact that your heartfelt apology is merely the same argument you've been making for years, with deeply insincere bells on.
"Had I foreseen a failure of this magnitude, I would have withheld my support. Even then, I would not have been able to bring myself to oppose the war...
...nothing on earth could have induced me to march or otherwise campaign for a course of action that would have saved the Baathist regime. But I would have stood aside."
See also Nobody Could've Predicted, Terrorists Are Bad; I May Have Been Wrong But You, Sir, Are a Cunt; Victory, Norman Geras