The "Beerbongs & Bentleys" rapper is looking to lock up the rights to "World Pong League" ... and Post and his legal team have gone so far as to file for a trademark on that name.
According to the docs, obtained by TMZ, Post wants his "World Pong League" to operate official beer pong tournaments, competitions, events and exhibitions.
And, just like the NFL, MLB or NBA ... ya gotta have merch! Post plans to put the league moniker on beverage glassware, drinking glasses, plastic cups, game tables, cup racks, balls and every piece of casual sportswear -- including boxer shorts -- under the sun.
Btw, Post once won $50,000 during a beer pong tournament so he also walks the walk.