Leafing: Removing leaves from your plants in encourage growth.
Lid: One US ounce of weed.
Limbing: Removing lower limbs (of your plant) to encourage growth.
Lit: To be in a very high state of mind.
Little John: New Zealand term for a two paper joint.
Log: Big joint.
Louis: UK slang for a sixteenth of an ounce of cannabis (as in Louis the XVI).
Lung: English term for a 2 Litre plastic bottle with a poly-bag attached to the bottom. When the bag is pulled out of the bottle the smoke fills it up.