When you whisk something, you stir it quickly and lightly with a kitchen tool also called a whisk. Grab that whisk and whisk those eggs!
Most whisks have long handles and curved wire loops, a design that makes it easy to beat air into ingredients as you whisk them. Before the metal whisk was invented in the mid-19th century, cooks used bundles of twigs to whisk batters. You can also use whisk to mean "move quickly," so you might say, "Her parents managed to whisk her off to school before she was truly awake."