My name is Megan Brach. I've been teaching english as a second language for four years. Learning english isn't fast, nor is it easy. But I'm going to help you get started, are you ready? Lets learn english. Here are three slang expressions you can use at school. First, ace', ace is when you do very well on a test. So if you study very hard, you will ace your exam. Next is flunk', flunk is when you do not do well on a test. So, if you don't study, you will flunk your exam. And last is pull an all-nighter', When you pull an all-nighter, it means you studied all night through. So for example, you can say I need coffee, I didn't get any sleep. I pulled an all-nighter.' And those are three slang expressions you can use at school.