Busfrö
Busfrö is a swedish word for ''you little devil'', or ''imp'', or basically a little kid that makes some ruckus or mischief. It quite literally means ''mischief seed.''
''Your kid is such a little devil, always doing pranks on the teachers''
''Devil? No, shes just a Busfrö.''
''Devil? No, shes just a Busfrö.''