Generally, to be quickly or especially successful, often when referring to seduction or other sexual adventures. Traditionally said to refer to classic film star and notorious womanizer Errol Flynn, though that isn't definitive.

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

To be very successful very quickly, especially in regard to sex. The phrase usually refers to Errol Flynn, an Australian-born actor who was famous for his life of excess, and was acquitted of statutory rape charges.

When you know you’ve got it made and are personally off the hook with what will likely be zero prison time.

To succeed in attaining a goal, especially in the sexual sense and for a man.

Refers to Errol Flynn the actor, noted for his large number of successful pursuits of women and girls.

Used to project acceptance to an event or party.

It’s suggested by some writers that the phrase really originated with another Flynn, Edward J Flynn—“Boss” Flynn—a campaign manager for the Democratic party during FDR’s presidency. Flynn’s machine in the South Bronx in New York was so successful at winning elections that his candidates seemed to get into office automatically.