
Bone idle
Colloquial Usage
Used informally among friends or in relaxed settings; not suitable in formal situations.

Don't say someone is 'bone idle' during a job interview; it's too casual.
Negative Connotation
Carries a strong negative judgment, often offending the person described.

Calling her 'bone idle' because she didn't help you was a bit harsh.
Accentuate Laziness
Emphasizes extreme laziness, more than just being occasionally lazy.

He won't even answer the phone, that's how bone idle he is.
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