(n.) The main pile of cocaine that is set aside. The rails are then pulled out as they are being consumed.
*WARNING* Do not under any circumstance snort the supply line (accidentally or purposely)! Could be fatal by either O.D. or severely pissing off a bunch of fiending coke heads who now have no more coke.
Damn! That dude just did the supply line. He is a dead man for sure!