/gung"hoh"/ , Informal.
adj.
1. wholeheartedly enthusiastic and loyal; eager; zealous: a gung-ho military outfit.
adv.
2. in a successful manner: The business is going gung-ho.
[ introduced as a training slogan in 1942 by U.S. Marine officer Evans F. Carlson (1896-1947) gong hé, the abbreviated name of the Chinese Industrial Cooperative Society, taken by a literal trans. as "work together" ]