Flappers held as their core fashion mantra that they wanted to liberate themselves from the rigidity of female forms of dress, from the petticoats and corsets, opting instead for manly attire. Not only was it more comfortable, but guys' clothing created a straight up and down silhouette, making all feminine curves disappear.
While flappers dressed in a novel, sometimes masculine way, they certainly didn't wear less makeup. Rather than the minimal makeup (or no makeup) advocated during the Victorian era, they drew in pencil-thin eyebrows, used lots of matte black shadow, and went for showstopping lip colors. To learn how to create a flapper inspired makeup look, check out this video.