Scotch; Scotch whisky
Abbreviation of スコッチウイスキー. In ordinary conversation, スコッチ usually means Scotch whisky rather than anything Scottish in general.
See also: スコッチウイスキー
I ordered Scotch on the rocks at the bar.
Scotch tweed
Abbreviation of スコッチツイード. This use is much more limited than the whisky sense and mainly appears in clothing, fabric, or fashion contexts.
See also: スコッチツイード
When talking about fabrics, スコッチ is sometimes used as an abbreviation for Scotch tweed.
We talked while drinking Scotch at the bar.
He was wearing a Scotch tweed jacket.
My father always orders Scotch with water.