No, a toaster does not hold any residual charge after it's unplugged. When you unplug a toaster from the electrical outlet, the electrical circuit is broken, and the flow of electricity stops immediately. There are no batteries or capacitors inside a typical toaster that would store electrical charge. Therefore, once unplugged, the toaster becomes completely electrically inert, and there is no risk of receiving an electric shock from it.
However, it's always a good practice to exercise caution when dealing with electrical appliances and avoid touching the heating elements or interior components, especially just after use when they may still be hot. Additionally, keeping the toaster clean and free of any debris will help maintain its safety and performance.