feeding the beast

Feeding the beast refers to the consumption of drugs subsequent to the first use of the day. This usually pertains to regular users, as the most satisfying hit of any drug is the first one of the day. This is due to its having the most noticeable effect, and satisfying the user's cravings, which in many cases, they are fighting all day prior. The phrase refers to the diminished effect of continued use of the drug combined with the user's essentially insatiable appetite to continue using.

The first cigarette of the day is the best; after that, you're just feeding the beast