Skirt and blouse voting means that when people go to vote, they are supposed to choose between two different things. One thing is like a "skirt" and the other thing is like a "blouse". So, for example, a skirt might be something called "president" and a blouse might be something called "senator."
When people vote, they have to decide which one they want to vote for. They can choose to vote for the "skirt" option, or the "blouse" option. It's like choosing which outfit you want to wear - do you want to wear the skirt or the blouse?
Sometimes, people might not like either option, but they still have to pick one. It's kind of like being served two different vegetables for dinner - if you don't like either one, you still have to eat one of them.
Overall, skirt and blouse voting is a way for people to make a choice between two different options, even if they might not like either one.