DCHP-1 Online
boomster 
1 † n. a person who creates enthusiasm for an undertaking; a promoter; boomer (def. 1).
See also: boomer (def. 1)
- 1908 Between seven and eight hundred people had gone up to these regions via Edmonton, bound for the Yukon, many of whom, after a tale of suffering which might have filled its boomsters' souls with remorse, had found solitary graves. . . .
2 n. one of the crowd of people who flock to an area that is booming.
- 1928 And so the boomsters fought their way out of the congested purlieus of Saskatchewan and southern Alberta to find breathing-room in the great open spaces of the Peace and the Athabaska.
- 1908 Between seven and eight hundred people had gone up to these regions via Edmonton, bound for the Yukon, many of whom, after a tale of suffering which might have filled its boomsters' souls with remorse, had found solitary graves. . . .