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1.
The lingering powder in the back of your nasal cavity that drips down your throat and just keeps giving you an extra boost after you've already been blowing lines.
"Damn! I thought I had snorted down all of that adderall, but I keep tapping into my reserve tank."

"Good thing I still have some blow left in my reserve tank. I'm all out of lines."
by agenthb April 16, 2010