Airports are a world of possibility - holidays beginning, loved ones reuniting, but also extreme displays of uncouth behavior.

One plane passenger was horrified to find someone completing some personal grooming whilst waiting for his flight by clipping his toenails in the lounge.

The act was captured in a post to Reddit, showing the gentleman in question with his slides on the floor while resting his foot on the airport seating to cut his nails.

'Bleach my eyes,' the Reddit user declared.

Users were both horrified and amused by the picture, sharing their thoughts online. 

'I mean to be fair when he puts his feet up into the section in front of him he wants them to look good.' one user joked. 

'My unfiltered mouth would have stated in an elevated voice, "THAT IS SO GROSS, DUDE!" but then I'd regret it being so loud,' claimed one flyer. 

'Saw someone do that on the plane once. I almost opened the emergency door and ejected them but I wanted to arrive safely at my destination,' shared another.

'There legitimately has to be something wrong with your head to think it's acceptable to clip your disgusting nails in public and leave your clippings behind,' whined someone else. 

Another declared: 'As a society, we need to bring back public shaming.' 

Previously, Diane Gottsman, an etiquette expert and owner of The Protocol School of Texas, told the Dailymail.com that practicing personal hygiene in public should be avoided.

'It's off-putting to have someone brushing their hair next to you and the hair is flying into another person's public space,' she said.

Grooming in airspace is a hot-button topic, with one passenger sparking a heated debate earlier this week after brushing her hair in first class. 

A woman shared a video of herself brushing her hair in business class and revealed another passenger in the background giving her dirty looks.

'Me in business class minding my business while aunty gives me nasty stares,' she captioned the post.

In the video, the woman is seen brushing her hair, tying it back, and getting comfortable in her spacious first-class seat.

While she brushed her hair for the video, another woman was seen looking at her in shock and disgust.

The original creator turned off the comments on her post, however, an Instagram account reposted the video with the caption, 'I just want to brush my hair in peace.' 

The altercation prompted a swift reaction from the internet, with many sounding off in the comments on whether it was appropriate behavior or not.

Elaine Swann, the founder of Swann School of Protocol and a former flight attendant told The Washington Post that passengers need to be aware of their space on a plane.

'I think people are forgetting that they are still in a public environment,' she said. 'We're on the aircraft and it's small. It feels very much like this is our own space. It's not out and about, walking in the mall or what have you, but an airplane is still a public environment.'