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
Get the roach mug.
The end of a joint, usually made from cardboard. The cardboard usually comes from the green card that is used to support the packets of cigarette papers, the packet itself or whatever club flyer happens to be handy. It derives its name from the derogatory term used for the grunts of the mexican army, "La Cucaracha" which means "the cockraoches", because, as part of their payment they eached received quantities of mariijana.

La cucaracha, la cucaracha
Ya no puede caminar
Porque no tiene, porque le falta
Marijuana que fumar.

(The cockroach, the cockroach
Now he can't go traveling
Because he doesn't have, because he lacks
Marijuana to smoke.)
you fuck, all you've left me with is the roach. i shall beat you upside the head to avenge this wrong.
by Kenny Evil July 12, 2006
Get the roach mug.
1. A pesky vermin insect that infests your house.

2. In many places a roach is a burnt joint, usually but not necessarily the very last end, it can be halfway finished and still be called a roach, the principle being on that it has already been smoked from.

3. Roofies, R2s, rohypnol, pills that can be used to get fucked up on usually with alcohol, or in many cases used as a date rape drug, effects can last for hours, with the user remembering little or nothing.
1. Buy some raid for your damn roach problem, Leo.

2. Save that roach for later I'm fucking high.
Wheres that roach that we were smoking earlier?

3. Dude, I just bought two roach pills from Brigg.
Hey can I have one of them roaches?
by weed-smoka May 5, 2007
Get the roach mug.
The butt of a joint, NOT named after a cockroach.
"The marijuana addict refers to the reefer butt as a 'roach'...because it resembles a cockroach."

"What the fuck are these people talking about?! You gotta be crazy on acid to think a joint looks like a goddamn cockroach."
by joesmithey April 22, 2012
Get the roach mug.
A derogatory term for a potential customer at a car dealership, who's credit will not pass, and who typically has no down payment and is upside down in any trade in they may have.
" Man, last week I sold five units, this week, I have'nt seen anything but roaches!"
by JB McDuffie May 19, 2007
Get the roach mug.
Noun. It refers to a person who one may have had past relationships with and who refuses to move on from that relationship. He/she continues to show up in your life.
You remember that guy I dated three months ago? I told him I wasn't interested and ended it with him. Well, he just text me and asked if I want to grab drinks with him tonight. He's such a roach - he just won't die.
by magbot2014 February 18, 2014
Get the roach mug.
england:slang term for rolled-up piece of cardboard put in the mouth end of a joint to catch tar which is produced by tobacco rolled in the joint.

america:usually means the end of a joint which can be re-used because there's still some weed in it. this occurs because in america, joints aren't rolled alot with tobacco and so don't need a filter.

not related to weed: a small freshwater fish.
-dude, you rolled this roach way too tight, i can't smoke this shit.
-well next time roll your own fucking spliffs, you retard.

-sir, we found marijuana roaches in your apartment
-so what, i smoke pot, what is that a crime?
-err...yeah

-i just caught a roach!
-wtf are your on about?
-the fish, you fuckhead
by Nicolo C April 18, 2011
Get the roach mug.