Cohabitation is when two groups of people who are supposed to work together and make decisions can't exactly agree. It's like when you and your friend are trying to decide what game to play, but one of you wants to play tag and the other wants to play hide-and-seek. Instead of working together, you both disagree and can't make a decision.
Now, let's say that the two groups are the government and the president. The government is made up of many different people who help run the country, like the president's friends. The president is the leader of the country and makes important decisions about how the country should be run.
When the government and the president can't agree on something, it's called cohabitation. The government and the president have different ideas about how to make the country better, but they can't come to a decision together. This can make it hard to get things done and can cause problems for the country.
So, just like when you and your friend can't agree on a game to play, when the government and the president can't agree on a decision, it's called cohabitation.