If you see someone stagger out of a bar, or walk unsteadily, like he's about to fall, chances are he's had a few too many drinks.
The word stagger isn't just used to describe the physical action of stumbling. When you're really shocked about a piece of news, it can stagger or shock you. When you want to spread something out overtime, like paying a large bill, you can stagger the payments over time. But, remember that if you fall behind, the debt you fall into might stagger you.