noun, noun or participle which takes 'suru'
eating between meals; wasteful eating; waste of resources
Refers to eating when not truly hungry, snacking wastefully, or consuming resources without need. Often used in contexts of dieting or frugality.
ダイエット中だから、無駄食いはやめよう。
I'm on a diet, so I'll stop eating between meals.
冷蔵庫を開けて無
I have a habit of opening the fridge and eating wastefully.
noun, noun or participle which takes 'suru'
living idly; loafing through life
Extended figurative use: living without purpose, wasting one's life, similar to 無駄飯を食う or 徒食 (としょく). Less common than the literal eating sense.
See also: 無駄飯 (むだめし) · 徒食 (としょく)
若い頃は無駄食いのような生活をしていたと彼は振り返った。
He reflected that in his youth he lived a life of idleness.