袋ふくろ叩だたき

noun

gang beating; beating someone up by ganging up

Physical assault by a group, often with the victim surrounded or unable to escape.

• 彼かれは夜よ道みちで袋ふくろ叩だたきにあった。

  He was beaten up by a group on the street at night.

noun

barrage of criticism; being ganged up on verbally

Figurative use: facing harsh criticism or attacks from many people at once, as if being beaten by a group.