Watch: Australian Ally Langdon's X-rated Today Show gaffe goes global

Keep it together, Karl. Photo / Today

An unfortunate slip of the tongue by Today Show co-host Ally Langdon is getting global traction, with the hilarious clip even picked up by US talk show host James Corden.

The original segment happened last week, when Langdon and co-host Karl Stefanovic were interviewing two gardening experts about proper lawn care.

Langdon lamented that her own backyard was looking worse for wear, because her lawn of couch grass was slowly dying.

But Langdon's pronunciation of "couch", while technically correct, had her co-host in fits of giggles - given "cooch" is also slang for female genitalia.

Ally's having problems with her cooch. Photo / Today

"I want to ask, because my cooch is dying," she began, as Stefanovic struggled to keep his composure.

"What have you been doing to it, if it's died?" one of the gardening experts gamely asked as Stefanovic buried his head in his hands.

"Well, the dog pees all over it …" said Langdon.

"Try and keep the dog off it, and you'll probably see results," said the gardener, as Stefanovic folded forwards on the couch, hysterically laughing.

"I don't understand what's going on with my co-host," said an apologetic Langdon.

Keep it together, Karl. Photo / Today

The gardener then followed Langdon's pronunciation of couch grass, advising her that "cooch has got really good wear and tear tolerance, so it can recover quickly".

Stefanovic eventually managed to regain his composure and dubbed the moment "possibly the best segment ever. We'll have more after the break – if we're still on air".

"I still don't understand," shrugged Langdon.

The clip gained traction online over the past week – a recording posted to YouTube viewed more than 120,000 times – before it found its way to US television and James Corden's Late, Late Show.

"An Australian TV host had an accidental slip-up while discussing lawn maintenance live on the air," Corden told viewers before playing the clip.

"Everyone needs to grow up, OK? She's just talking about trimming her grass down under," he quipped.