What is fly the coop?

Famous quotes containing the word fly:

    The son will run away from the family not at eighteen but at twelve, emancipated by his gluttonous precocity; he will fly not to seek heroic adventures, not to deliver a beautiful prisoner from a tower, not to immortalize a garret with sublime thoughts, but to found a business, to enrich himself and to compete with his infamous papa.
    Charles Baudelaire (1821–67)