Drops by is a phrasal verb that means to visit someone or somewhere for a short period. Some antonyms for this term include staying away, avoiding, shunning, refraining, neglecting, and ignoring. If you're not fond of meetings, then dropping by a colleague's office is not your cup of tea. Instead of dropping by their workplace, you can exchange emails, letters or phone calls. If you want to cancel a planned visit, you can express your intention to stay away politely. When you see someone walking towards you in a park, and you're not in the mood to interact, then you can ignore the person and pretend you did not notice them.