(n) An ootheca. A long term accumulation of cockroach egg sacks fecal mater and otherwise long dead roach body parts. Often found in dark hard-to-reach places especially in kitchens as in under the refrigerator or around cheap Chinese-made electronic items such as clocks.
There were quite a bit of roach casings from that last tenant we just evicted.
Roach roulette is the act of rolling a blunt or joint that leave approximately two to three centimeters of tobacco left at the mouth peice which would be your Roach, rather than potentially wasting marijiauna. This can be turned into a game where, when passed around, who ever gets the tobacco first has to fill the next shell and pass theirs around.
Stopped by my friendshouse to smoke and everyone was in a circle with their weed. I joined in a played roach roulette and we passed so many joints around we couldn't move.