Not give a stuff
Definition 1 of 1
Pro Tip 1/3Colloquial Usage
This phrase is very informal and best used among friends or in casual conversations, not in formal situations. 
She doesn't give a stuff about following the latest fashion trends.
Pro Tip 2/3Emotional Detachment
The phrase often implies a strong indifference that suggests the person is emotionally detached or uninterested. 
He didn't give a stuff when he heard they lost the game.
Pro Tip 3/3British Origin
Originally British slang, this phrase may be less understood or used in other English-speaking cultures. 
When I visited the US, it seemed they didn't give a stuff about cricket.
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