The phrase "like a blue streak" is often used to describe someone or something moving quickly or with great energy. However, there are several other synonyms that can be used to convey the same meaning. For instance, "like lightning," "like a rocket," or "like the wind" are all effective substitutes for "like a blue streak." "With lightning speed," "at breakneck pace," and "in a flash" are also great ways to capture the sense of speed that "like a blue streak" connotes. Other expressions that can be used include "at warp speed," "fast as a bullet," and "like a shot." Ultimately, the best synonym for "like a blue streak" depends on the context and tone of the writing.