It’s good that you’re checking! This phrase is informal and can be seen as rude depending on the situation. If you’re talking to teachers or in a formal setting, it’s better to use something like: • “We made them upset.” • “We annoyed them.”

It might depend on the culture of the school, the country it's in etc. It's not a terrible word - like the f bomb, but it's kind of crude. Just to be safe, I wouldn't use it in the classroom, unless you're familiar enough with a certain teacher that you know it won't bother them. "made them angry" will work - also you can look up other expressions.