What is "greased lightning"

n. Something incredibly fast (now mainly used in comparison: ''like'' or ''faster than '''greased lightning''''').

Greased Lightning is a 1977 American biographical film, starring Richard Pryor, Beau Bridges, and Pam Grier, and directed by Michael Schultz. Richie Havens provided the soundtrack. Greased Lightning is a film loosely based on the true life story of Wendell Scott, the first African American NASCAR Sprint Cup Series race winner and 2015 NASCAR Hall of Fame inductee. Greased Lightning was partially filmed in Winder, Georgia Athens, Georgia at the former Athens Speedway, and Madison, Georgia. And also Middle Georgia Raceway in Byron, Georgia

Greased Lightning is a surviving 1919 American silent comedy film directed by Jerome Storm and written by Julien Josephson. The film stars Charles Ray, Wanda Hawley, Robert McKim, Willis Marks, Bert Woodruff, and J. P. Lockney. The film was released on April 27, 1919, by Paramount Pictures.