Play video content EXCLUSIVE TMZ.com

Jabari Parker proved he's a serious threat as a shooter -- at least when it comes to beer pong.

The Milwaukee Bucks star hit up a house party near the Milwaukee School of Engineering on Saturday night -- and partied with a bunch of the students.

But the highlight of the evening ... when Parker was asked to join in on the B.P. game -- and crushed shot after shot after shot!

Sources at the party tell TMZ Sports Parker was super nice to everyone and people were stoked he was there ... especially the girls.

We're told Parker has a friend on the MSOE basketball team -- and that's why he was there.

He was super social with people and took pics with anyone who asked.

Beer pong is apparently super popular with NBA stars -- Michael Jordan and Charles Barkley have gotten into the sport in recent years.

But from what we're told ... Parker would wipe the floor with the old guys.

#LetsGetaTournamentGoing!!