This term is used by the British to say Yes or your right

The Nussy, or the “nose pussy”, if you will, was discovered during the corona virus pandemic of 2020. People that had to be tested for Covid-19 had to have their nose swabbed right where the brain connects, which often led to people rolling back their eyes and gagging.

A nose-swab-fetish developed from this, because we, as humans, ruin everything.

Similar to indeed, this word means nothing when used in common conversation.

an agreement to a preceding assertion.

Used when someone tries to make a joke/funny statement/payout, when is isnt funny.

Is interchangable with the sarcastic "Orrrrrite"

It means yes okay, but in the main its use is restricted for the use of English posh people certainly when used as a sincere reply.

Fuck you i don't give a fuck what u wanna say but i'll pretend i do.