The antonyms for the term "whooping up" can include expressions like calming down, settling, or pacifying. When someone is whooping up, they are likely engaging in enthusiastic, lively behavior that might be characterized by cheer, excitement, or celebration. However, in some contexts, whooping up might also suggest reckless or frenzied activity that lacks control or thoughtfulness. In contrast, antonyms like calming down or settling could imply a more measured or subdued approach. On occasion, antonyms like quelling, suppressing, or repressing might also be associated with the opposite of whooping up, suggesting a deliberate effort to dampen or control one's emotions or reactions.