The phrase "gave come-on" refers to an action in which someone tries to initiate a romantic or sexual relationship with another person. Antonyms for this phrase would include actions that express disinterest, avoidance, or rejection. Some examples could be "ignored," "rejected," "detached," "uninterested," or "aloof." Other antonyms could be actions that indicate a desire for friendship rather than romance, such as "befriended," "welcomed," or "invited to hang out." Using antonyms to describe these opposing behaviors can help to convey a clearer picture of the social dynamics at play in any given situation.