shag1 / shag/ • n. 1. [usu. as adj.] a carpet or rug with a long, rough pile: wall-to-wall shag carpet. ∎ [as adj.] (of a pile) long and rough: a shag pile. ∎ cloth with a velvet nap on one side.2. a thick, tangled hairstyle or mass of hair: her hair was cut short in a boyish shag | [as adj.] a shag cut. 3. (also shag tobacco) a coarse kind of cut tobacco.shag2 • n. a western European and Mediterranean cormorant (Phalacrocorax aristotelis) with greenish-black plumage and a long curly crest in the breeding season.shag3 • n. a dance originating in the U.S. in the 1930s and 1940s, characterized by vigorous hopping from one foot to the other.shag4 • v. [tr.] Baseball chase or catch (fly balls) for practice.shag5 Brit., vulgar slang • v. (shagged , shag·ging ) [tr.] have sexual intercourse with (someone).• n. an act of sexual intercourse. ∎ a sexual partner of a specified ability.DERIVATIVES: shag·ger n.