The act of pulling one's face tightly towards the rectum whilst receiving the standard version of a Rusty Trombone which creates a seal around the anus with the lips. The Dizzy Gillespie (DG) provider then flagulates causing the receiver's (Dizzy Gillespie'ed) facial cheeks to expand, giving the appearance of the legendary trumpet player, Dizzy Gillespie.
Dizzy Gillespie-(v.) I was getting my salad tossed, then I reached back and pulled her head in tight and let one rip! That bitch got Dizzy Gillespie'ed!!!