An amount that you spend is an expense for you.
The spending can be in different areas including living expenses or entertainment expenses or even lifestyle expenses.
Some expenses are essential like food or rent or even conveyance to get from home to work.
Other expenses are more dependent on the choices that you make in terms of your personal interest or even lifestyle.
Expenses should be based on the income that is earned so that there are some savings and there is no shortage of money.