vrzmati

1. colloq. (vrzmati se) to hang around; to mill about
   Neki čudan tip se vrzma oko zgrade. — Some strange guy is hanging around the building.
   Deca su se celo popodne vrzmala po kuhinji. — The kids were milling around the kitchen all afternoon.
2. (of a thought, vrzmati se po glavi) to keep going round in one's head
   Ta ideja mi se već danima vrzma po glavi. — That idea has been going round in my head for days.

Used almost always with "se".