Research in 2014 revealed people who frequently swear are more likely to have a bigger vocabulary than their clean-tongued peers.
A colourful tongue does not mean the talker is lazy or uneducated, the study published in the Language Sciences journal found.
Instead, those who are more confident using taboo words are more articulate in other areas.
Kristin and Timothy Jay, the Massachusetts College of Liberal Arts psychologists who co-wrote the study, said it proved swearing was positively correlated with verbal fluency.
‘We cannot help but judge others on the basis of their speech,’ they wrote.
‘Unfortunately, when it comes to taboo language, it is a common assumption that people who swear frequently are lazy, do not have an adequate vocabulary, lack education, or simply cannot control themselves.’
In their conclusion, they added: ‘The overall finding of this set of studies, that taboo fluency is positively correlated with other measures of verbal fluency, undermines the [normal] view of swearing.’