'go-getter' definitions:

Definition of 'go-getter'

(from WordNet)
noun
Someone whose career progresses rapidly [syn: go-getter, whizz-kid, whiz-kid, ball of fire]

Definition of 'go-getter'

From: GCIDE
  • go-getter \go-getter\ n. a person disposed to initiate action, rather than take instructions; an enterprising person; a person with a strong drive to accomplish useful goals; especially, one whose career progresses rapidly. [WordNet sense 1]
  • Syn: whizz-kid, whiz-kid, ball of fire. [WordNet 1.5 +PJC]