女大十八变

女大十八變
nǚdàshíbābiàn
  1. lit. a girl changes eighteen times between childhood and womanhood (idiom)
  2. fig. a young woman is very different from the little girl she once was

CEDICT

All of the changes that a girl makes when turning into a woman; blossom into womanhood

Wiktionary

龙女神通广大，善于变化。见《景德传灯录．卷一二．幽州谭空和尚》。后借以泛指女性在发育成长过程中，容貌性格的变化多端。

重編國語辭典

Entry Composition

1 女大 nǚdà (slang) female university student; female college student
2 十八 shíbā
  1. eighteen
  2. 18
3 变 biàn
  1. to change
  2. to become different
  3. to transform
  4. to vary
  5. rebellion