短小精悍

duǎnxiǎojīnghàn
  1. (of a person) short but plucky (idiom)
  2. (of an article) concise and forceful

CEDICT

  1. not imposing but strong and capable (of a man)
  2. short and pithy; terse and forceful (of a piece of writing)

Wiktionary

  1. 形容身体矮小而精明强悍的人。《史记．卷一二四．游侠传．郭解传》：「解为人短小精悍，不饮酒。」《汉书．卷九○．酷吏传．田延年传》：「延年为人短小精悍，敏捷于事，虽子贡、冉有通艺于政事，不能绝也。」也作「精悍短小」、「矮小精悍」。
  2. 比喻文章或发言短而有力。如：「这篇文章真是短小精悍，简洁有力。」也作「精悍短小」。

重編國語辭典

Entry Composition

1 短小 duǎnxiǎo short and small
2 精悍 jīnghàn
  1. (of a person) shrewd and valiant; able and efficient
  2. (of style of writing) pithy and poignant
  3. pithy and poignant
  4. shrewd and valiant; able and efficient