bulletproof

[boo l-it-proof] /ˈbʊl ɪtˌpruf/
adjective
1.
(of vehicles, glass, clothing, etc.) capable of resisting or absorbing the impact of a bullet.
2.
Informal. safe from failure; without errors or shortcomings and beyond criticism:
a bulletproof system; a bulletproof budget.
verb (used with object)
3.
to make (something) bulletproof.
Origin
1855-60; bullet + -proof
Examples from the web for bulletproof
  • The thing felt pretty bulletproof during my short test-drive.
  • The site itself is a beautiful tribute, right down to the bulletproof red plastic case.
  • The suggestions of changing common practices is to improve the data itself, and make it more bulletproof.
  • His bulletproof vest stopped the bullets, and he was not injured.
  • Those who survived took to the streets in protest, demanding better weapons and bulletproof vests.
  • The recipe is simple and bulletproof for anyone with a rimmed baking sheet and an oven.
  • Western security contractors were known to frequent the store, sometimes wearing bulletproof vests.
  • The snow was bulletproof, the sky gray and our faces hidden behind scarves.
  • Unfortunately, there is no such thing as bulletproof armor.
British Dictionary definitions for bulletproof

bulletproof

/ˈbʊlɪtˌpruːf/
adjective
1.
not penetrable by bullets: bulletproof glass
verb
2.
(transitive) to make bulletproof
bulletproof in Technology


Used of an algorithm or implementation considered extremely robust; lossage-resistant; capable of correctly recovering from any imaginable exception condition - a rare and valued quality. Synonym armor-plated.
[Jargon File]