A dope fiend or junkie who cons people into pumping their gas at a gas station for spare change to buy Crack or Cocaine
Damn look at that Pump Master over there, what a loser
by bapekid4 November 05, 2006
1 more definition
One who participates in the smoking of either cigarettes or pot to the extreme.
Better keep the gear away from the pumpmaster or it'll be the last you see of it.
by Darrell Smith June 17, 2005