"Impromptu visit" refers to a visit that is unplanned or arranged suddenly, without any prior notice or preparation.
Sentences with «impromptu visit»
They were informed the children would be asked where they slept at night and might receive impromptu visits from social workers to verify this. (newyorkschooltalk.org)
A quick impromptu visit to the garden to pick some juicy ripe raspberries straight off the bushes into the basket, and a few into the mouth, was called upon.... (pureella.com)
Assembly Speaker Sheldon made his second impromptu visit down the hallway of the Legislative Correspondence Association Friday morning, confirming to reporters that he is indeed still in Albany and no final agreement had been reached on a spending plan. (nystateofpolitics.com)