1. Being very thin; below a desirable or healthy weight
   "a long scrawny neck";
   - scraggy, scraggly, bony, skinny, underweight, weedy
    
2. Inferior in size or quality
   "scrawny cattle";
   - scrubby, stunted

Derived forms: scrawniest, scrawnier

See also: inferior, lean, meager [N. Amer], meagre [Brit, Cdn], thin

Encyclopedia: Scrawny