Boss of All Bosses is the second solo studio album by American rapper Slim Thug from Houston, Texas. It was released on March 24, 2009, by his Boss Hogg Outlawz label, distributed by E1 Music. The album features guest appearances from Mannie Fresh, Z-Ro, Mike Jones, Scarface and UGK, while the production on the album was primarily handled by Mr. Lee, along with several producers, including Jim Jonsin, Mr. Rogers, and Bigg Tyme, among others.