The mathematical world's greatest bamboozle! In reality, Q.E.D. stands for "Quod Erat Demonstrandum" (Latin for "that which was to be demonstrated"), used at the end of proofs to declare "BOOM! I just proved this thing!"
But here's SpongeBob with his rainbow-powered alternative definition, suggesting it's just a "Quick Easy Demonstration" - which is EXACTLY what mathematicians wish their proofs were! Anyone who's ever sweated through a 3-page proof only to triumphantly scribble those three letters knows the irony here is *chef's kiss* perfection.