a shaggy tangled mass or covering (as of hair). long coarse or matted fiber, nap, or pile. a layered haircut of uneven length. tobacco cut into fine shreds. any of various waterbirds related to the cormorants. SHAGGY. to fall or hang in shaggy masses. to make rough or shaggy. to have sexual intercourse with. to chase after. to catch (a fly) in baseball practice. to chase away. to move or lope along. to dance the shag. any of various dances of the southern U.S. that employ lively footwork with a minimum of upper-body motion.