U

unco (pronounced ung-ka)
Unco means very or extremely.
The island has a whisky trail for the unco drouthy.
The phrase unco guid is used to describe those who are excessively religious, self-righteous, or narrow-minded. One of Burns's most well-known poems is the 'Address to the Unco Guid', an attack on the rigidly righteous.
Is Gaeldom populated exclusively by drunks and the unco guid?
Unco is also used to mean strange or unfamiliar.
an unco sicht
The word is a Scottish variant of uncouth.

Up-Helly-Aa (pronounced up-hell-ee-ah)
Up-Helly-Aa is an annual festival held in Lerwick in Shetland on the last Tuesday of January. The last hundred years has seen it evolve from a fire festival honouring the sun during the winter solstice into a celebration of Shetland's Norse heritage. The culmination of the modern-day festival consists of a torch-lit procession of locals dressed in Viking costumes who then throw their torches into a Viking long ship newly built by the islanders.
The word is from up finished and haliday a Scots form of holiday, as the celebration comes at the end of the Yule holiday.

uplift (pronounced up-lift)
To uplift is to pick up, collect, or take possession of something.
They had instructed their hauliers not to uplift grain if there was any doubt about where it had been stored.
...He came round to uplift the rent.

upset price
The upset price of an item at an auction in Scotland is the minimum price at which the owner is willing to sell. The English equivalent is reserve price.

ur (rhymes with fur)
In Glasgow and West Central Scotland, ur is a spoken form of are.
Ur youse no ready yet?

ùrlar (pronounced oor-lar)
In bagpipe music an ùrlar is the basic tune around which a pibroch is based.
The word is Gaelic and means floor.

urnae (rhymes with journey)
In Glasgow and West Central Scotland, urnae is a spoken form of am not.
Am urnae guan tae the dancin the night.