on a fool's errand

(redirected from go on a fool's errand)

*on a fool's errand

Fig. involved in a useless journey or task. (*Typically: be ~; go ~.) Bill went for an interview, but he was on a fool's errand. The job had already been filled. I was sent on a fool's errand to buy some flowers. I knew the shop would be closed by then.
See also: errand