Bulee "Slim" Gaillard (January 9, 1911 – February 26, 1991), also known as McVouty, was an American jazz singer and songwriter who played piano, guitar, vibraphone, and tenor saxophone. Gaillard was noted for his comedic vocalese singing and word play in his own constructed language called "Vout-o-Reenee", for which he wrote a dictionary.

In addition to English, he spoke five languages (Spanish, German, Greek, Arabic, and Armenian) with varying degrees of fluency.

He rose to prominence in the late 1930s with hits such as "Flat Foot Floogie (with a Floy Floy)" and "Cement Mixer (Put-Ti-Put-Ti)" after forming Slim and Slam with Leroy Eliot "Slam" Stewart. During World War II, Gaillard served in the US Army Air Forces. In 1944, he resumed his music career and performed with such notable jazz musicians as Charlie Parker, Dizzy Gillespie, and Dodo Marmarosa.

In the 1960s and 1970s, he acted in films—sometimes as himself—and also appeared in bit parts in television series such as Roots: The Next Generations. Gaillard resumed touring the circuit of European jazz festivals during the 1980s.