Word Study
buckle down
THESAURUS
buckle down
be determined, be in earnest, be resolved, buckle to, cross the Rubicon, die fighting, die hard, endeavor, go all out, go for broke, hump, hump it, knuckle down, lay to, mean business, never say die, ply the oar, spare no effort, take the plungeFor further exploring for "buckle down" in Webster Dictionary Online