The phrase "beat drum for" typically means to publicly support or advocate for a particular cause, idea, or person. Some antonyms for this phrase may include ignoring, rejecting, or disavowing. Alternatively, one could actively oppose or criticize the cause, idea, or person in question, providing antonyms such as denounce, condemn, or vilify. Other antonyms may depend on the specific context or subject matter at hand, but generally involve expressing dissent or opposition instead of support or promotion. The English language is replete with antonyms that can provide a wide range of contrasts to the phrase "beat drum for.