rapscallionisim Share definition Flag The act or idea of being dishonest, silly, troublesome, with the intent to do so and the disregard to former norms or rules. He danced wildly and with rapscallionisim. They broke the law with childish rapscallionisim. rapscallionisim by PickeledPlum May 4, 2024 Get the rapscallionisim mug.