verb (used without object) Informal.
Origin of hightail
Go as fast as possible, especially in leaving; rush off. For example, With the police now searching for them, they hightailed it out of town, or When Jane remembered it was his birthday, she hightailed it to the bakery for a cake. This expression alludes to the raised tail of a rabbit or other animal that is fleeing. [Colloquial; late 1800s]