This is the 3076th most frequent German word.
bube
"Boy" or "jack" (in playing cards).
In this sentence, 'Bube' is used to refer to a young boy in a casual context.
Der Bube spielte fröhlich im Garten.
The boy played happily in the garden.
Here, 'Bube' refers to the cards often called 'Jacks' in card games.
Im Kartenspiel hatte sie zwei Buben auf der Hand.
In the card game, she had two jacks in her hand.
The term 'Bube' here is used poetically or archaically to describe a young man in a positive manner.