Some fine (expensive) clothes. Term was popularized by members of Duke Ellington's Band -- the Duke being a stickler for well dressed musicians.

Got the covid-19 vaccine

an alternative to the colloquial use of the word 'sick', used as a positive, like an alternative for wicked, great etc. to describe something as very good, or of a high standard, or to express great admiration.

short for silk boxers

Produced as a cocoon covering by the silkworm, and used in fine fabrics and textiles.

a delicous brand of soy milk

"Silks," or "the silks," is a slang term used to describe an item of great worth--typically dropped from a "boss" in an RPG video game.

The term originates from "The Silks of the Victor," the unique Ancient Plate from Blizzard's masterpiece Diablo II. Legend holds that this item could only be dropped from Diablo himself, but only few mortal men have had the mettle to challenge and defeat the beast.

In some circles, this term has been expanded to describe items acquired in real life.