wasted vote
ballot that does not help elect a candidate; either a ballot cast for a losing candidate, or a ballot cast for a winning candidate in excess of that needed to win
en-US/ˈweɪstɪd ˈvoʊt/
en-GB/ˈweɪstɪd ˈvəʊt/
ballot that does not help elect a candidate; either a ballot cast for a losing candidate, or a ballot cast for a winning candidate in excess of that needed to win