crotch in WordNet English dictionary

1. the angle formed by the inner sides of the legs where they join the human trunk
   crotch  fork 
   
2. external sex organ
   genitalia  genital organ  genitals  private parts  privates  crotch 
   
3. the region of the angle formed by the junction of two branches
   "they took the south fork"; "he climbed into the crotch of a tree"
   fork  crotch