The phrase "picks on" refers to a behavior in which one consistently targets and treats another person unfairly or unkindly. Synonyms that could be used in place of "picks on" include "bullies," "harasses," "intimidates," "persecutes," "oppresses," "torments," "teases," "taunts," and "ridicules." It can be difficult for the person being "picked on" to handle the situation without feeling hurt or overwhelmed. It's important to recognize this type of behavior and take action to protect yourself, whether that means standing up for yourself or seeking help from others. Remember, you don't have to tolerate anyone who constantly "picks on" you.