The disgusting findings revealed that more than a third of people admitted that their partners openly belched during meals.
A quarter of people also admitted starting conversations with their mouth full, according to the survey of 2,000 people by Glotechrepairs.co.uk.
Its findings reflected far more poorly on men, nearly half of whom happily belch openly during meals, according to their partners.
And almost a quarter of the women said their partner regularly chews with their mouth open while 22.5 per cent revealed their partner picks food out of their teeth.
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More than half of Brits also adhere to the five second rule when food was dropped on the floor.
Women were the biggest culprit in this category with 56.37 per cent admitting to doing it.
An astonishing 68.1 per cent of all the respondents also admitted preparing a meal whilst ill.
A further 10.7 per cent admitted that they’ve seen their partner re-use dirty plates and cutlery on a regular basis to avoid the washing up.
But it seems the shameless activity doesn’t stop at home as just over a tenth of Brits eat smelly food at work or on public transport.
Londoners had the foulest eating habits followed closely by those in the North East and Yorkshire.
Despite their poor eating habits, people in London were more likely to stick with traditional household values and eat their meals at the dinner table.
The South West was deemed the region with the best eating manners, edging out the East Midlands and Wales respectively.
Mark Reeves, from GlotechRepairs.co.uk, said: “Bad eating habits are usually kept behind closed doors, but the findings from this study suggest that the majority of Brits are guilty of many of them.
“These habits may be deemed harmless, but especially in regards to our findings about the five second rule and the re-using of cutlery, these are habits that can lead to unwanted illnesses and it’s amazing to see how many Brits are willing to put their health at risk to avoid cleaning up after themselves.”
The survey also showed three quarters of Brits wash their hands before preparing a meal, helping to prevent the spreading of harmful bacteria.
Eatright.org has previously stated that before every meal you should wash your hands with soap and warm water for at least 20 seconds.