Urban Dictionary: Bud
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2)A bundle of marijuana that you can smoke in a joint or in a pipe
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To answer your question;
First, you get a can of BUD and drink it all.
Then you gently flatten one side of the can (best if it corresponds to the opening on the top of the can).
Next, you poke tiny holes in one spot on the flattened side of the can (the middle is the easiest and best).
You then place some of your preferred ‘material’ (marijuana or tobacco) over the area with the tiny holes.
Put your mouth over the opening, light the ‘material’ with a lighter and draw slowly.