"Bid something up" is a common phrase used in auctions to refer to the action of raising the price of an item by making higher bids. However, there are several synonyms that can be used to describe this action, such as "drive up," "push up," "pump up," and "boost." These words all imply a deliberate effort to increase the value of an item through strategic bidding. Other synonyms for "bid something up" can include "inflate," "escalate," and "heighten." Regardless of the word used, the intention is always the same - to make a winning bid by outbidding other interested buyers.