1) Annual 2) Weed 1) Bane of gardeners 2) Crab grass 3) Finger grass 4) Grass 5) Lawn bane 6) Lawn intruder 7) Lawn invader 8) Lawn problem 9) Lawn scourge 10) Problem in suburbia 11) Unwanted growth 12) Unwanted lawn growth 13) Weedeater target 
any of about 300 species of grasses in the genus Digitaria (family Poaceae), especially D. sanguinalis or the slightly shorter D. ischaemum (smooth ...
[n] - grasses with creeping stems that root freely
crab grass noun grasses with creeping stems that root freely; a pest in lawns