shag

Concise Oxford English Dictionary © 2008 Oxford University Press:
shag1

▶noun

• 1 a carpet or rug with a long, rough pile.

  ■ cloth with a velvet nap on one side.

• 2 a thick, tangled hairstyle.

• 3 coarse-cut tobacco.

– origin OE sceacga ‘rough matted hair’, of Gmc origin; rel. to shaw2.

Concise Oxford English Dictionary © 2008 Oxford University Press:
shag2

▶noun a cormorant with greenish-black plumage and a long curly crest in the breeding season. [Phalacrocorax aristotelis.]

■ chiefly NZ any cormorant.

– origin C16: perh. a use of shag1, with ref. to the bird's ‘shaggy’ crest.

Concise Oxford English Dictionary © 2008 Oxford University Press:
shag3 Brit. vulgar slang

▶verb (shags, shagging, shagged) have sex with. ▶noun an act of sexual intercourse.

– derivatives
shagger noun.

– origin C18: of unknown origin.

Concise Oxford English Dictionary © 2008 Oxford University Press:
shag4

▶noun a dance originating in the US, characterized by vigorous hopping from one foot to the other.

– origin 1930s: of obscure derivation; perh. from obs. shag ‘waggle’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
shag5

▶verb Baseball chase or catch (fly balls) for practice.

– origin early 20th cent.: of unknown origin.