real jam

English

Noun

real jam (uncountable)

1. (UK, slang) Anything exceptionally good.

   That's the real jam!

   • George Augustus Sala, The Story of Jack the Painter, in 1863, Tales and Essays (volume 3, page 10)

     It's real jam, that little pictur his ^[sic]. I wouldn't mind springin' the price to a century. There! Shall I send my boy round to tell him so?

   • 1877, Punch, page 134:

     It was real jam to see little NORRIS, who was out for the first time, in a horrid state about his four greys.

References

• John Camden Hotten (1873) The Slang Dictionary