Who am I, who are you, etc. to do something? Definition 1 of 4Pro Tip 1/2Questioning Authority Use it to challenge someone who seems to overstep their power or position. Who are you to cancel the meeting without asking us? Pro Tip 2/2Emphasize Hierarchy This phrase often highlights a perceived imbalance in social or professional hierarchy. Who is he to discipline the manager, he's just an intern?