Rick Ross -- Mine's Bigger Than Wiz Khalifa's

Rick Ross pulled out his bone inside a room full of people and shamed all the other dudes standing nearby -- including Wiz Khalifa -- and it wasn't even close.

Ross performed Saturday night at Supper Club in L.A. -- where Sincere Show from "Love and Hip Hop Hollywood" was hosting the event. Wiz came by to show some love and support Ricky Rozay.

Support aside, Rick just needed help inhaling that massive joint.

There's a reason they call him the boss.