• Marijuana, pot, draw, blow, weed, puff, shit, ganja, hash, rocky, skunk, oil.

• Cannabis is a natural substance from a plant commonly called ‘Cannabis sativa’.

• It comes in a solid, dark lump known as ‘resin’, or as crushed flower heads and small leaves (sometimes with stalks and seeds) called ‘grass’, or as a sticky oil.

• It can be rolled with tobacco in a spliff or joint, smoked on its own in a special pipe or cooked with and eaten.

• There are different strengths of cannabis – some, such as skunk, are very strong.