Randy Jackson Is Definitely "Done" Being an "American Idol" Judge on the sinking ship

Randy Jackson is stepping down as an "American Idol" judge.  When asked for comment he simply said the words "yo" and "dawg" a thousand times in a row...

TMZ claims RANDY JACKSON is DEFINITELY out as an "American Idol" judge . . . and will instead move into some sort of "mentoring" role, as rumored.

So-called "sources" say some "Idol" higher-ups aren't so sure Randy is "well-suited" for a mentoring role . . . but that they feel like they need to keep him around since he's the last original judg