The phrase "middle of the road" refers to a moderate or neutral stance that doesn't take a firm position on any particular issue. The antonyms for this phrase could include extremist, radical, or partisan. An extremist position represents a viewpoint that is far removed from the mainstream and often controversial. On the other hand, a radical position advocates for fundamental change and doesn't necessarily strive for compromise. Lastly, a partisan position is one that is heavily influenced by one's political or ideological beliefs and can be highly divisive. In contrast to the middle of the road, these antonyms represent more confrontational and ideologically-driven stances.