The phrase "flying start" refers to a rapid, successful beginning or an advantageous position from which progress can be made. It is often used in sports metaphors to describe a team that has gotten off to a good start by winning their first few games of the season. In other contexts, it may refer to someone who has gained an early lead or head-start in a competition or endeavor. The phrase can also be used more broadly to describe any situation where someone or something is given an advantageous beginning that sets them up for success later on.