Can't really tell over the internet. It could be that the teenager is just being a teenager and seeing how far they can push the boundaries. Teenagers can go through a very rebelious stage. Sometimes it can be a reaction to things going on in the home and they want you to take notice of them or even a cry for attention. We would need to know if the teenager had any other symptoms or emotional problems. Some people with bipolar can act on impulse in the manic phase but they are not usually aware of their actions at the time or thinking of the consequenses. Only after some time do they feel some shame and that might not be until someone else has pointed it out. With medication and psychotherapy someone with bipolar can learn to cope with these impulses. I cannot say whether your teenager has bipolar but it would be worth discussing this with a mental health professional if it is an ongoing problem.