 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 "Roach Tip", "Smoking Tip, "crutch" or "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, ("roach tobacco") refers to powdery, low-quality tobacco.