I had a random thought, and I wonder if it's already a thing, and what would be the consequences of it.

Imagine a voting system, where a voter, instead of having just a single vote for a candidate they support, has in addition to that a single negative vote against a candidate they are most strongly against.
It of course wouldn't work in a two-candidate, but I imagine that in one with more candidates, in particular something like a proportional-multi-winner, or a first round before a run-off with a single winner (although here I feel like it's more prone to manipulation), it could help curb more "controversial" dominant candidates and push forward more for the "compromise" candidates.
Does this already have a name? Is it used anywhere? What other consequences would there be, like in terms of vote tactics? Is this idea just retarded?