Antonyms for the phrase 'watching out for' include ignoring, neglecting, disregarding, overlooking, dismissing, and abandoning. While watching out for something means paying attention to it and being vigilant, these antonyms suggest the opposite - that one should pay little or no attention to the matter at hand. Ignoring or neglecting something could result in serious consequences, while disregarding or overlooking something could cause one to miss important details. Finally, abandoning something altogether could mean giving up on a project, a relationship, or a goal, which could significantly impact one's life. Therefore, it's crucial to always watch out for the things that matter and avoid these antonyms.