女大十八變

女大十八变
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

龍女神通廣大，善於變化。見《景德傳燈錄．卷一二．幽州譚空和尚》。後借以泛指女性在發育成長過程中，容貌性格的變化多端。

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 變 biàn
  1. to change
  2. to become different
  3. to transform
  4. to vary
  5. rebellion