WordNet (r) 3.0 (2006):

go all out
    v 1: perform a task as well as possible; "The cast gives full
         measure every night" [syn: go all out, give one's best,
         do one's best, give full measure]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "go all out":
   buckle down, carry through, cut loose, do to perfection,
   do up brown, drive, drive on, endeavor, exhaust every move,
   follow out, follow through, follow up, forge ahead, give way to,
   go ahead, go all lengths, go flat out, go for broke, go the limit,
   go unrestrained, go whole hog, hump, hump it, hustle, knuckle down,
   lay to, leave nothing hanging, leave nothing undone, let go,
   let her out, let loose, make things hum, open her up, open up,
   overlook nothing, ply the oar, press on, push, run wide open,
   run wild, scramble, see it through, see out, shoot ahead,
   shoot the works, spare no effort, step lively,
   strain every nerve