loon

A crazy or deranged person; a lunatic.

An electric fire came next, followed by an umbrella and then a colander. "This bowl will carry no water," he muttered. "Some loon hath pierced it with holes."

What's it like to be a loon? / I liken it to a balloon

An idler, a lout.

The diuell damne thee blacke, thou cream-fac'd Loone: Where got'ſt thou that Gooſe-looke.

A boy, a lad.

A harlot; mistress.

A simpleton.

Any of various birds, of the order Gaviiformes, of North America and Europe that dive for fish and have a short tail, webbed feet and a yodeling cry.

The Loone is an ill ſhap'd thing like a Cormorant; but that he can neyther goe nor flye; he maketh a noiſe ſometimes like a Sovvgelders horne.

[O]h, yes! the loon does shriek dreadfully - particularly when there's fine rain […]

A municipality of Bohol, Philippines.