Patrick Beverley really didn't take the Bucks' playoff loss well on Thursday night ... 'cause not only did he hurl a basketball TWICE at some Pacers fans -- he also got into a strange tiff with a reporter afterward.
Beverley's bizarre antics all started with about two and a half minutes left in Milwaukee's Game 6 loss in Indianapolis ... when for some reason, he chucked a ball at a female Indiana supporter who had been sitting a few rows from the Bucks' team bench.