Being a responsible adult means to hold a job, be on time and treat people nicely. being a responsible adult also means to work hard. It can mean a lot of things like doing chores, taking care of pets and helping others. Spending money is something that can be hard to spend or save on things you need or don't need can also be being responsible for. You can also be a responsible adult by watching both sides of the streets and driving safely. Cleaning something that someone made a mess and left it there is also being responsible. I have been very responsible for doing chores around the house like taking out the trash and washing dishes.