Three 6 Mafia's DJ Paul: Screw the Oscar Snub ... I Got an Oscar Birthday Cake!!!

DJ Paul's either not feeling the Oscar snub much of Hollywood is feeling or he just has a funny way of showing it.

The Three 6 Mafia rapper helped son Nautica ring in his 20th birthday -- which also happened to be Paul's big day -- in Vegas over the weekend. Judging from the 12:1 ratio on the dance floor ... his son had a great time.

We're told the father-son bash began with a screening of 'Star Wars' before they hit the club at D Casino for an EDM show. He got Nautica a 'Star Wars' cake and an Oscar themed cake for himself.

It's hard out there for a pimp ... but not for DJ Paul and his son.