1. In England, joints are rolled with tobacco to help them burn. The tobacco leaks tar, which can cover and burn the smoker's lips and fingers. A roach, in England, is a small piece of cardboard, often torn from the pack of rolling papers, which is rolled and placed into the mouthpiece of the joint. This makes it easier to hold and also makes it possible to smoke the entire joint without the aid of a roach clip.

2. In America, people tend not to smoke joints using tobacco, and what is called a roach in England is termed a filter in America. The roach is the end of the joint which cannot be smoked without a roach clip, because the smoker's fingers would be burnt. The roach contains the most resin and is stronger than the rest of the joint because THC smoke has passed through and settled on it with each inhalation. A roach is often saved and smoked in a joint made from other roaches, which is much stronger than a normal joint.
1. "Put the roach in, I won't smoke without it"

2. "Save the roach, we can smoke it with some others later on"
by Cunny June 07, 2004
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1. The end of a joint.
2. (British slang) The bit of rolled-up cardboard you put at the mouth-end of a joint.
by hux May 22, 2003
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The small bit of marijuanna and brown resinated paper left after smoking a joint. Can be used to make second generation joints made from all roaches, smoked during times of dryness, or saved for a pipe.
After you smoke a joint you are left with a ROACH.
by Anonymous April 28, 2003
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A dirty person. Someone who smells bad,and likes to be shirtless in public this person comes from slums/ projects. Basically a dirty wannabe thug.

Most think they're funny
by tzlawoops May 29, 2014
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The part that is left over from a blunt of a joint. It can be saved for a pipe or bong or used to make a new blunt/joint.
Kevin, that blunt is dying just save the roach.
by Wiffmoot March 26, 2004
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the end of a joint, can be eaten or saved. Contains the most resin
by alex April 26, 2003
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A small, cone shaped, rolled up strip of cardboard which is placed at the mouth-end of a joint, often made out of the little flap on rizla boxes. A roach serves various purposes, it;
- Stops your weed fallin out
-If someone bums it (slobers on the end) it stops the soggy paper from falling apart
-It gives your spliff a standard cone shape, which is almost impossible to achieve without a roach
'Aye yo man, iz u got a roach?'
'For real' *rips strip off rizla box lid

'I smoked that spliff right down to the roach'
by bOnGwAtEr September 21, 2003
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