Buddybuddy, the term originally referred to two people who were excessively friendly with each other, has its antonyms in words like hostile, unfriendly, cold, distant, and aloof. If someone is not buddybuddy, they may not be on good terms with others, thus being called an enemy or adversary. Their behavior may not be cheerful or easygoing but rather aloof. They may also not share mutual interests or have the same wavelength on various aspects of life. Thus, when someone is not buddybuddy, they may be distant, disagreeable, or combative to others.