From Longman Dictionary of Contemporary Englishbe rubbing your handsbe rubbing your handsinformalHAPPY to be pleased because something has happened which gives you an advantage, especially because something bad has happened to someone else → rub
Examples from the Corpus
be rubbing your hands• And ace marksman Aldo is rubbing his hands in glee at the prospect.• Frankie was rubbing his hands together and Chopper merely nodded now and then with a silly expression on his face.• Good quality barley is making £151 a tonne so, not unnaturally, both farmers and merchants are rubbing their hands.• Battle is joined and lawyers are rubbing their hands in anticipation.• The doctor was rubbing her hands, probably to warm them, but it looked like a gesture of glee and greed.• He was rubbing your hands to warm you up.• Players' agents and satellite salesmen will be rubbing their hands with glee.• Thousands of people will be rubbing their hands with glee. 