Bulletproof - Definition
bulletproof
adj 1: without flaws or loopholes; "an ironclad contract"; "a
watertight alibi"; "a bulletproof argument" [syn:
unassailable, unshakable, watertight,
bulletproof]
2: not penetrable by bullets; "bulletproof glass"; "bulletproof
vest"
v 1: make bulletproof; "bulletproof the car"