From WordNet (r) 3.0 (2006):
roach
n 1: a roll of hair brushed back from the forehead
2: the butt of a marijuana cigarette
3: street names for flunitrazepan [syn: R-2, Mexican valium,
rophy, rope, roofy, roach, forget me drug,
circle]
4: any of numerous chiefly nocturnal insects; some are domestic
pests [syn: cockroach, roach]
5: European freshwater food fish having a greenish back [syn:
roach, Rutilus rutilus]
v 1: comb (hair) into a roach
2: cut the mane off (a horse)