什么愈气愈大?

气球...
...青蛙....

脾气
脾气 [简明汉英词典]
temper
spleen
A large, highly vascular lymphoid organ, lying in the human body to the left of the stomach below the diaphragm, serving to store blood, disintegrate old blood cells, filter foreign substances from the blood, and produce lymphocytes.
脾：一种较大的含丰富血组成的淋巴器官，位于人体横隔膜下胃部左侧，承担着贮存血液、分解旧的血细胞、过滤血液中异物、产生淋巴液等功能
A homologous organ or tissue in other vertebrates.
脾脏：其他脊椎动物的相似组织或器官
Obsolete This organ conceived as the seat of emotions or passions.
【废语】 该器官被看作感情或热情等情绪的发源地
Ill temper:
坏脾气：
vent one's spleen.
排泄怒气
Archaic Melancholy.
【古语】 忧郁
Obsolete A whim; a caprice.
【废语】 古怪；吹毛求疵

对的。就是脾气。。呵呵

头！！！