Definition of garbage in, garbage out in US English:

garbage in, garbage out

(also GIGO)

phrase

North American
  • Used to express the idea that in computing and other spheres, incorrect or poor quality input will always produce faulty output.

    • ‘Like most things in life, the rule is GIGO: garbage in, garbage out.’
    • ‘First, the project suffered from GIGO: garbage in, garbage out.’
    • ‘Those computers, like all computers, operate by a basic rule: garbage in, garbage out.’
    • ‘A more compelling reason, however, is that software can't eliminate the problem of garbage in, garbage out.’
    • ‘It's like they say about computers: garbage in, garbage out.’