The answer to 'garbage disposal overflowing' is that a clogged or jammed garbage disposal is the most common cause. Symptoms include water backing up in the sink, a humming or grinding sound from the disposal, or a foul odor. Solutions can range from DIY fixes like using a disposal wrench or baking soda and vinegar to calling a professional plumber if the issue persists or you're uncomfortable working on the disposal.
Garbage disposals can get clogged for several reasons, such as putting the wrong type of food down the drain, a buildup of debris, or a mechanical issue with the disposal itself. It's important to address the problem quickly to prevent water damage and unsanitary conditions in your kitchen.