There are several synonyms for "losing streak" that can be used to describe a period of consecutive losses. One possibility is "slump," which implies a temporary drop in performance. Another option is "skid," which suggests a loss of control or momentum. "Downturn," "decline," or "drop" may also be appropriate, depending on the context. In the sports world, "losing spree" or "losing run" may be common phrases to describe a string of defeats. Regardless of which synonym is used, the basic meaning remains the same - a series of losses that can be difficult to break.