Use 'you know who' when you want to avoid saying someone's name, usually because it's sensitive or obvious.

Avoiding Names

'You know who' assumes the listener knows who you're talking about. Don't use it with strangers.

Shared Knowledge

Use this phrase to discreetly discuss someone, often to keep their identity private in public.

Use 'you know what' to discuss something obvious or previously mentioned without naming it directly.

Only use 'you know what' when you're sure the other person understands the reference.

'You know what' can address sensitive topics indirectly to be polite or discreet.

'You know what' shows you're annoyed or exasperated, often before making a complaint or important declaration.

It's a phrase to pivot the conversation or bring up a new point that may be bothering you.

'You know what' can indicate you've reached a decision after careful thought, often sounding resolute or final.