Joel Embiid turned up in a BIG way for his 24th birthday -- dropping 12 RACKS on alcohol and partying the night away with smokin' hot models and 76ers co-owner Michael Rubin!!
The boozy bday bash went down at LIV Nightclub at Fontainebleau in Miami Beach on Saturday night ... where we're told the NBA star bought out the bar -- coppin' Magnum bottles of Dom Perignon for all his thirsty friends in attendance.
Other than Rubin, the celeb guest list included Nick Cannon (who was DJ'ing), Diddy's son Justin Combs, Victoria Secret model Jasmine Tookes and IG smokeshow Jocelyn Chew -- who surprised Joel by poppin' out of a cake a la Marilyn Monroe!