thruster

Etymology
. The surfboard sense was coined (but never trademarked) by, who created the design in 1980. The name was almost immediately applied generically to any surfboard with that fin design.

Noun

 * 1) One who thrusts, who pushes or stabs.
 * 2) A device for propelling an object, especially a spacecraft or a ship (marine vessel).
 * 3)  A bow thruster or a stern thruster.
 * 4)  A surfboard (usually a shortboard) with three fins of approximately equal size, one centred at the back, one on each side about 25cm forward and out near the rails.
 * 5) An ambitious, driven person; a go-getter.
 * 1) An ambitious, driven person; a go-getter.