have sex with (someone)

an act of having sex

a carpet or rug with a long, rough pile

wall-to-wall shag carpet

a thick, tangled hairstyle or mass of hair

her hair was cut short in a boyish shag

a shag cut

a coarse kind of cut tobacco

a western European and Mediterranean cormorant with greenish-black plumage and a long curly crest in the breeding season

a dance originating in the US in the 1930s and 1940s, characterized by vigorous hopping from one foot to the other

chase or catch (fly balls) for practice

you run down to the field and hit a few baseballs and shag a few fly balls