In Europe, the United Kingdom and most Commonwealth nations, "roach" can also refer to a bit of rolled thin cardboard in one end to serve as a mouthpiece - called a "filter" in North America. When this is employed, a joint can still be held securely after it has burnt down to a short length; thus, the entire length of the joint may be smoked without the aid of a roach clip.
In Spanish, tabaco de cucaracha ("roach tobacco") refers to powdery, low-quality tobacco.
Roaches found in cars, embedded in the soles of shoes, etc have been responsible for several drug convictions in the UK and Channel Islands, despite in some cases other evidence being circumstantial or coincidental.
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