e/Jump the gun

Information
has gloss	eng: The idiom Jump the gun has its roots in an athlete starting a race before the starting pistol is fired. It refers to someone or refers to an act when it is started earlier than expected or when something is spoken without required thinking. In finance it refers to a scenario where various financial instruments are traded based on some knowledge that is not yet public.
lexicalization	eng: Jump the gun
instance of	c/English idioms