The phrase "be the up" typically means to have the advantage or to be in a favorable position. Synonyms for this phrase include "have the upper hand," "be in control," "be ahead," "be winning," "have the edge," "be on top," "dominate," "prevail," and "triumph." Each of these words describes a state of being where one party has gained an advantage or is dominating the situation. These words can be useful in a variety of contexts, from sports to business to personal relationships. Knowing these synonyms can help you to communicate more effectively and express yourself with greater clarity and precision.