A term used to display one's disbelief at a claim made by a third party. A sort of sarcastic way of saying 'yes'.

or

a prefix to a sentence which is designed to be cynical and false.

originally believed to have originated from Tonbridge school, although there is some debate ont he matter. Dulwich College also lay claim to the phrase which is now widely used among social elites of several major universities and frequently on gap years in the south east asia region
'chief, I've drunk at least 3 buckets' - FJ
'yarth' - all

or

'yarth you're a good bloke'
by chiefycolonel November 25, 2009
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A word used to describe how fucking disguised you are at whatever nasty ass thing you just witnessed seeing, hearing, smelling, or remembering.
A) Situation: you and a buddy casually walking down the street and your buddy steps barefoot in a steaming pile of dog shit.

Buddy: "ah fuck my life dude, I stepped barefoot in dog shit !"
You: Yarth bro, don't come inside until that shits off.

Situation B (close conversation because "Becky" has some hot gossip for "Jane")
A: Jane Jane! Listen to this shit ! Come close. No one can hear...*whisper*
Jane: Yaaaaaarth Becky! Your breath smells like by brothers barefoot after he stepped in dog shit last Week!

Becky: Yarth Jane! It does not! That's gross!

I forgot to floss, ok! You know I have that dead tooth and it can smell sometimes!!

Jane: Yarth Becky!!!
by Justthetip May 6, 2021
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molly: ugh i lost my hockey game today
lindsay: well thats because you didn't have enough yarth, silly goose!
by yarth mum October 9, 2019
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a more fun away to "your mom", also something good to say when ur scared
molly: you're annoying, boring, and large
lindsay: yarth mum!
by yarth mum October 8, 2019
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