How did Steph Curry get down for his dirty 30??
By pullin' up to his party in a frickin' YACHT ... and slamming a plate of ribs during a live E-40 set!!
And that's just a taste of what went down at Steph's oceanside shindig ... where the 2-time MVP and his Warriors bros rang in his birthday "Ballers" style.
A ton of lit song and dance went down Monday night in SF ... featuring Curry himself, who hopped onstage to lead a Rick James karaoke bro down!!
Of course, his teammates weren't gonna let him have all the fun -- right, KD, Draymond and Klay?
E-40 wasn't the only music artist in attendance -- Paramore's Hayley Williams was also in the house to serenade him with the happy bday song.
Steph looked happy as hell the whole night ... and we would be too with hundreds of millions in the bank at age 30.
Party on, Stephen.
Update: The Warriors have cancelled Tuesday's team practice. Hungover, much??