A Wisconsin Badgers hoops fan has been banned from buying tickets to the school's sporting events ... after making disgusting slant-eye gestures toward Northwestern students during a game.
The incident happened during Tuesday's matchup at Welsh-Ryan Arena in Illinois ... when a man in Wisconsin colors was recorded on video standing up and taunting the Northwestern student section with the middle finger and anti-Asian gesture.
The fan recording the incident was in complete shock ... as well as the targeted students, who appeared to be of Asian descent.
The man was eventually kicked out of the arena by security ... and as he was leaving, the guy continued to make the racist gesture as the Northwestern students cheered for his departure.
The Univ. of Wisconsin thanked Northwestern for removing the Badgers fan after the offensive act ... and announced on Thursday that he's no longer welcome at Badger sporting events.
"We join with @UWBadgers and all #Badgers in condemning the abhorrent anti-Asian actions of an attendee at the Northwestern game this week," the school said in a statement.
"We applaud NU for removing him. He is no longer welcome at UW Athletics events -- we are barring him from buying tickets on our platform."