Comedians in his inner circle thought Larry Reeb was a shoo-in for “Last Comic Standing” when he auditioned for the show’s fourth season, but he didn’t make it past the show’s quarterfinals. Perhaps that shouldn’t be such a surprise: Reeb’s acerbic brand of humor is hardly meant for the masses. Playing the stereotypical angry uncle, “Uncle Lar” shares any politically incorrect thought that passes through his mind—the results are frequently as uncomfortable as they are funny, but they’ve made him a favorite on the syndicated radio program “The Bob & Tom Show.”