Going on a spree typically refers to engaging in a wild and extravagant spending or partying spree. Antonyms for this phrase would include words such as prudent, restrained, economical, and conservative. Instead of going on a spree, one could opt to save money, practice self-control, or engage in more low-key or simple pleasures. These antonyms reflect a desire to act more responsibly, strike a balance between indulgence and restraint, and avoid the negative consequences that can come from acting impulsively. Ultimately, choosing not to go on a spree can lead to a more fulfilling, happy, and healthy life.