It is altogether the untidiest public park I saw in Ireland.
Her room was the untidiest that Nellie had ever seen, and the tea a picnic.
I entered what was then, and probably is still, the untidiest room in England.
The bloods wore evening dress; even the untidiest junior oiled his hair and put on a clean collar.
early 13c., "untimely, unseasonable, unsuitable," from un- (1) "not" + tidy (adj.). Cf. West Frisian ontidich, Middle Dutch ontidich, Dutch ontijdig, Old High German unzitich, German unzeitig, Norwegian utidig "untimely, unseasonable, unfavorable." Meaning "poorly cared for, not neat" is recorded from mid-14c.