The phrase "butt against" refers to something colliding or touching tightly against another object. Antonyms for this phrase would include words that describe separation or distance. Words like "away from," "apart," "diverge," "detach," and "disconnect" are all potential antonyms for "butt against." These words emphasize the concept of space and distance rather than closeness and contact. While "butt against" is often used in a physical context, its antonyms can be applied to emotional and interpersonal situations as well. For example, we might use antonyms like "distant," "aloof," or "disconnected" to describe someone who is emotionally separated from others.