Kurtis was on "TMZ Live" when he called out Mark Herring for being disrespectful, ugly and degrading when he wore blackface in 1980 as a 19-year-old college student at the University of Virginia. Herring admitted to dressing up as the rapper -- complete with "wigs and brown makeup" -- when he performed Blow's songs.

Virginia's leadership has come under fire after Governor Ralph Northam admitted earlier this week to wearing blackface when he dressed as Michael Jackson during a 1980 costume and dance competition. Herring called for Northam's resignation, but now Herring is dealing with his very own controversy.

Check it out ... Kurtis says even though Herring was a fan, what he did by wearing blackface was a disgrace. Kurtis then gives Jimmy Fallon props for getting it right on 'The Tonight Show.'