What does 'busting nut' mean?

My daughter keeps saying it and I am not entirely sure what it means. My son said it has to do with something VERY inappropriate and I am hoping he is just yanking my chain again. He always tries to get me flustered. He once told me only the gay students wear hats at school any more besides the sports players. For WEEKS I thought the student population was primarily . He also once got me to believe the students were given blood transfusions before taking the ACT in order to ensure they were performing at their best! My husband has no idea what 'busting nut' means but that doesn't say much. He rarely has anything to do with the family any more. He mainly just sits on a box in the garage staring into space. If this does mean what my son said it does my daughter will be punished severely for saying she likes yogurt cause its like someone 'busting nut' for her! I am strongly thinking this is not the case and would like some feedback. Please help before tomorrow begins so I can address this before my children go to school and my husband heads for the dang old garage!