Flapjack
Flapjack may refer to:

Food
Flapjack (oat bar), a sweet tray-baked bar in British and Commonwealth cuisine
Pancake, a flat cake made from batter, sometimes known as a "flapjack"

Organisms
Flapjack lobster (Ibacus peronii), a crustacean that lives in shallow waters around Australia
Flapjack octopus (Opisthoteuthis californiana), a deep-sea mollusc
Flapjack (plant) (Kalanchoe luciae and Kalanchoe thyrsiflora), native to South Africa

Entertainment
The animated series The Marvelous Misadventures of Flapjack

Other uses
Flapjack River, a tributary of Mattawa Bay of the Gouin Reservoir in La Tuque, Quebec, Canada
Flying Flapjack, nickname of the Vought XF5U experimental U.S. Navy World War II aircraft

See also
Flapjax, a computer programming language