Steve Aoki's a great DJ -- but clearly a horrible Shaun White impressionist ... 'cause he comically failed at trying to hit a back flip on the slopes this week.
The 44-year-old posted video of his attempt at the difficult snowboarding trick on Tuesday -- and it's pretty hilarious.
In the footage, you can see Aoki in a blizzard hitting a ramp at full speed ... before launching himself into the air and slamming into the powder below him.
To his credit, he did get nearly all the way around -- but before he could land the trick, he pounded the snow hard.