Nelson Mandela Muntz[1] is a fictional character and the lead school bully from the animated television series The Simpsons, where he is best known for his signature mocking laugh "Ha-ha!". He is voiced by Nancy Cartwright. Nelson was first introduced in Season 1's "Bart the General" as an antagonist, but later became more of an anti-hero, continuing to bully those weaker than him while occasionally showing a friendly and sensitive nature underneath. Nelson lives in poverty with his mother in a