speed demon

speed demon — idiom

1. a person or thing that goes extremely quickly or finishes jobs much faster than

1.慣用語B2
釋義

a person or thing that goes extremely quickly or finishes jobs much faster than others

例句

On the badminton court, Reema is a speed demon during singles matches.

be a speed demon in sport

During late-night orders, the new packing robot turns into a speed demon.

turn into a speed demon for fast work

同義詞
  • speedster

    more often used for a very fast driver or vehicle

  • whiz

    often emphasizes doing a task quickly and skillfully

  • fast mover

    broader and plainer, with less vivid force

反義詞
  • slowcoach

    informal and usually used only for a slow person

文法句型

be a speed demon

become a speed demon

turn into a speed demon

ride like a speed demon

用法筆記

Often follows be, become, or turn into. In driving or racing contexts, it can sound admiring, but it may also suggest that the speed is a little reckless.

常見錯誤

❌Our quiet printer is a speed demon because it makes little noise.
✅Our printer is a speed demon because it prints each page in seconds.
💡the phrase praises great speed, not quiet operation.
❌Anthony is a speed demon because he always has new ideas.
✅Anthony is a speed demon because he finishes each sketch before lunch.
💡it describes doing something very quickly, not simply being creative.