A genuinely worthless word. From TVR Scarcely used words.
So worthless, wwftd doesn't claim it.

unsonsy (un-SON-see) adj. 1. luckless; not fortune; ill-omened. 2.
not handsome; plain.

From part of a poem:

AE day a wan'ring fiddler, lame,
Upon a brig sat far frae hame;
Frae tim'er case alias fram,
He drew's bread winner,
And on the range-wa' laid the same,
Alas poor sinner!
For lo, a wild unsonsy blast,
Down to the stream his fiddle cast;
Whilk hopeless on the current past,
Wi' monie a hobble,
Leaving its master all aghast,

And if his fiddling matched the poetry, good riddance to his fiddle.

sounds like Bobby Burns to me... great stuff! most of his stuff is right up your alley, Bill!