The phrase "knocking the chip off one shoulder" refers to provoking someone to become aggressive or confrontational. While this idiom may communicate a certain idea, it is important to consider alternative ways to express yourself. One synonym for this phrase might be to "pick a fight" with someone. Another option could be to "prod" or "poke" someone, intentionally causing them to become upset or defensive. You might also choose to "push someone's buttons" or "stir the pot," in order to get a reaction. Each of these phrases conveys a similar meaning, but using a variety of words helps to keep your language fresh and interesting.