E-40 got the boot at the Kings-Warriors game this weekend following an apparent argument with a fan that escalated into a shouting match with security ... and his eventual removal.
The Bay Area rapper -- who's a big Warriors fan -- was sitting courtside Saturday night in Sacramento's Golden 1 Center for Game 1 of the series ... but, somewhere around the 4th quarter, he appears to have gotten into it with a Kings fan who was sitting behind him.
Per reports, E-40 was standing up a lot and blocking the view of folks a row or two back -- who were complaining.