Not sure the right wording but can I DEFINE an entire block of code with 1 Line?

Something like that? :

#define W \
{\
  for(pos = 0; pos < 180; pos += 1)\
  {\
    myservowrite(pos);\
    delay(15);\
  }\
  for(pos = 180; pos>=1; pos-=1)\
  {\
    myservowrite(pos);\
    delay(15);\
  }\
}

//With parameters it's a little harder, you have to create new variables and copy the parameters into it, in order to work with them. Example:
#define PrintIntPlus2(value) \
{\
  int v = value;\
  v += 2;\
  printf("%d", v);\
}


void setup()
{
  W;
  PrintIntPlus2(10);
}

But I agree it's bad practice, but sometimes very useful to create "functions" that are very hard to write the normal way.