"Keep on truckin" is a figurative expression that means to persist and persevere. Antonyms for this phrase would be to give up, quit, surrender, or throw in the towel. When facing challenges or obstacles, it can be tempting to throw in the towel and stop trying. However, giving up does not lead to success, and it can even lead to regret. It is important to keep on truckin, to keep pushing forward even when the going gets tough. This requires resilience, determination, and perseverance. So, keep on truckin, and never give up on your dreams or aspirations!