roach

1. (US) A cockroach.US

2. (US, slang, smoking) The butt of a marijuana cigarette.USslang

3. (US, slang, smoking) An entire marijuana cigarette, blunt, or joint.Examples: "In his half hour of free time between brooms it was Willie's custom to smoke his lunch in an alleyway. He'd take just half a roach, only enough to make him feel a new day was starting, no more no less."USslang

4. (UK, slang, smoking) The filter of a rolled cigarette or joint, made from card or paper.Examples: "Last toke is the yellowing fabric of the roach, containing the stuff that is less than tobacco."UKslang

1. (nautical) Sail material that forms a concave curve rather than straight leech (aft edge) of a sail to increase the sail area over that of a simple triangular sail.

1. (transitive) To cut or shave off the mane of a horse so that the remaining hair stands up on the neck.transitive

2. (transitive, by extension) To cut a person's hair so that it stands straight up.broadlytransitive

1. (UK, obsolete, mining) A bed or stratum of some mineral.Examples: "After long Working of this Coal, it was found upon the rising Grounds, that there lay another Roach of Coal, at the Depth of 14 Yards under it"UKobsolete

2. (UK, regional) Gritty or coarse rock; especially Portland stone or similar limestone.Examples: "The roach, both of the top and bottom beds, is always imperceptibly incorporated with the freestone, which is invariable situated beneath it."UKregional

1. A surname.countableuncountable