a broad flat limb without fingers, used for swimming by various sea animals such as seals, whales, and turtles

not all seals are the same: some swim with their front flippers while others propel themselves with their back feet

a person who buys and sells something, especially shares or property, quickly in order to make a profit

as a house flipper, Smith specializes in finding undervalued properties

the rise of home flippers further increases the demand for housing in the real estate market