Old English sheepdog
noun
one of an English breed of large working dogs having a long, shaggy, gray or blue-merle and white coat that hangs over the eyes, and a bobbed tail, originally developed to drive sheep and cattle.
Origin of Old English sheepdog
First recorded in 1885–90
British Dictionary definitions for old english sheepdog
Old English sheepdog
noun
a breed of large bobtailed sheepdog with a profuse shaggy coat