WordNet (r) 3.0 (2006):

go for broke
    v 1: risk everything in one big effort; "the cyclist went for
         broke at the end of the race"

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "go for broke":
   be determined, be in earnest, be resolved, bell the cat,
   buckle down, buckle to, carry through, court danger,
   cross the Rubicon, defy danger, die fighting, die hard,
   do to perfection, do up brown, exhaust every move,
   flirt with death, follow out, follow through, follow up,
   go all lengths, go all out, go the limit, go whole hog,
   leave nothing hanging, mean business, never say die,
   overlook nothing, play Russian roulette, play with fire,
   see it through, see out, shoot the works, strain every nerve,
   take the plunge, tempt Providence