From Longman Dictionary of Contemporary EnglishRelated topics: Insects, Fish, Drug cultureroachroach /rəʊtʃ $ roʊtʃ/ noun [countable]1American English informalHBI a cockroach2HBFa type of European fish3informalMDD the end part of a marijuanacigarette that has been smokedExamples from the Corpusroach• He was like a roach, could melt into the crackedrecesses of the tenements all around.• Dace and roach on the SalmonHallstretch but chub main target to big baits.• Swineford second field producing chub and a few good roach.• He caught a good couple of pounds of roach on ledgeredcasters from bites that were all but invisible.• Quality roachboosting returns in Chester, legered bronzemaggot best.• Skimmers, roach and small perch from most Liverpool sections but pikeactive.• To them, roachspray may simply carry a nastyodor.Originroach1. (1800-1900)cockroach2. (1100-1200)Old Frenchroche