Make whoopee is a slang term that refers to having sexual intercourse. Some antonyms for this term include abstain, repress, refrain, and suppress. These words suggest the act of controlling one's sexual desires or avoiding sexual activity altogether. Other antonyms for make whoopee may include words such as chastity, celibacy, and abstinence, which evoke the idea of denying oneself sexual pleasure. It's important to note that these antonyms may have different connotations and implications depending on the context in which they are used. Ultimately, the choice to engage in sexual activity or not should always be consensual and respectful of all parties involved.