scruff definition by Webster's New World
- the back of the neck; nape
- the loose skin at the back of the neck of some animals
Origin: ; from Old Norse skrufr, a tuft of hair, forelock, variant, variety of skruf, altered by metathesis ; from skufr, tuft ; from Indo-European base an unverified form (s)keup- from source Old English scyfel, woman's headdress
scruff definition by American Heritage Dictionary
Origin: Alteration of dialectal scuft, scuff.