cock ‧ roach /ˈkɒk-rəʊtʃ $ ˈkɑːk-roʊtʃ/ BrE AmE ( also roach American English ) noun [countable]
[ Date: 1600-1700 ; Language: Spanish ; Origin: cucaracha , from cuca 'caterpillar' ]
a large black or brown insect that lives in dirty houses, especially if they are warm and there is food to eat