Duke Ellington, Count Basie, Earl Hines, Cab Calloway and Louie "Satchmo" Armstrong were all jazz greats.
Bugs spoofs the Myrtle Reed line "I've just washed my hair and I can't do a thing with it!"
At the beginning, Bugs is reading a huge book, "Tales of Knighthood and Gallantry" by Burton. There is no such book.
"Sir Osis of the Liver" refers to cirrhosis of the liver, the sad end for many an alcoholic, but still the object of humor at the time. On the other hand, Worcestershire Sauce, a tasty and popular English condiment, was always being poked fun at because of its pronunciation (Woosta-sheer).