The phrase "good vibrations" usually refers to positive energy or feelings, so antonyms for this phrase would be associated with negative energy or feelings. Some antonyms for "good vibrations" could be "bad vibes," "negative energy," "discord," "dysfunction," "tension," "hostility," "malaise," "depression," "misery," "gloom," or "despair." These words are often associated with negative experiences, negative people, or negative environments that can dampen or completely extinguish positive feelings. It's important to try and surround yourself with people and environments that give off "good vibrations" to maintain a positive and healthy state of mind.