your kitchen sink, due to food and fat waste. this issue may be solved, in most of the case, with a simple plunger.
this is also a very common issue, and it usually happens in your bath due to clogs of hair or soap. it can be really irritating, but a good thing is that you can fix it yourself if you react on time. you will only need a plunger, but a mix of baking soda and vinegar may also dissolve it.
we all hate having out toilet clogged, but as it happens due to mixture of paper and human waste, it is also one of those plumbing issues that you 