Definition of shags:
(n) :
Matted material; rough massed hair, fibres etc.
(n) :
Coarse shredded tobacco.
(n) :
A type of rough carpet pile.
(n) :
(often attributive) A deliberately messy, shaggy hairstyle.
(v) :
(transitive) To make hairy or shaggy; to roughen.
(n) :
Any of several species of sea birds in the family Phalacrocoracidae (cormorant family), especially a common shag or European shag (Phalacrocorax aristotelis), found on European and African coasts.