The term "over nice" refers to someone who is excessively polite, cloying, or ingratiating. Antonyms for this phrase may include terms such as rude, impolite, curt, brusque, or blunt. These words describe individuals who do not go above and beyond to be polite and may even be abrasive or confrontational. Other antonyms may include terms such as aloof, indifferent, disinterested, or apathetic, which indicate a lack of interest in cultivating social relationships or pleasing others. Ultimately, finding the right level of social grace and consideration for others is important to strike a balance between being polite and being seen as "over nice.