YMCMB rapper Mystikal — the guy behind the 2000 hit “Shake Ya Ass” — is going back to the pokey … all because of a domestic violence arrest back in February.

Long story short … Mystikal was put on probation in 2010 after spending 6 years in a Louisiana prison for sexual battery and extortion. So when he was arrested for domestic abuse in February, the judge ruled it was a violation of his probation.

Now, Mystikal — real name Michael Tyler — has been ordered to spend 90 days in jail … beginning on May 14.

“Watch ya’self.”