"23, Skidoo" is an American slang phrase that gained popularity in 1891, encouraging someone to leave quickly or escape a situation. It originates from the Flatiron Building on 23rd Street, New York City. The building's design created wind gusts, which often caught pedestrians off guard. People gathered to watch women struggle with gusts lifting their skirts. Police humorously dispersed crowds by telling them to "23, skidoo," embedding the expression into American vernacular and culture.