class A

class A (not comparable)

1. Synonym of first class (“best or top”).
   • 2012, Ann Benton, Teenagers:

     Surely no child from a good home would become what I have termed a class A fool!

class A (plural class As)

1. (UK, slang) Any illicit drug (e.g. cocaine, heroin) categorised as “class A” under the United Kingdom's Misuse of Drugs Act (1971).
   • 2024 January 21, Jack Rooke, “Tennis Table Tennis”, in Jim Archer, director, Big Boys, season 2, episode 3, spoken by Danny (Jon Pointing):

     Finally! If only you'd been supplying the people of Margate with arabica beans instead of dodgy class As.

• Jonathon Green (2024) “class A n.”, in Green’s Dictionary of Slang