The phrase "knocking chip one shoulder" means to intentionally provoke or challenge someone in a confrontational manner. Synonyms for this phrase include "throwing down the gauntlet," "picking a fight," "starting trouble," and "instigating conflict." These phrases all describe the act of intentionally challenging someone, whether physically or verbally. Other synonyms for "knocking chip one shoulder" include "defying," "taunting," and "provoking." Regardless of the specific words used, these synonyms all relate to the act of intentionally instigating a conflict or confrontation, often for the purpose of proving oneself or asserting dominance.