Swearing might mean you're smart

Two studies say a foul mouth signals a bigger vocabulary and a smaller appetite for lying.

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Sep 12, 2026

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Swearing might mean you're smart

Two studies say a foul mouth signals a bigger vocabulary and a smaller appetite for lying.

In brief

Two studies say a foul mouth signals a bigger vocabulary and a smaller appetite for lying. Swearing is one more tool in a well-stocked vocabulary, and the people who use it tend to be the more honest ones. Originally reported by Psychologies.

The habit we try to quit

The habit we try to quit

Kids are told swearing is rude, and plenty of adults still chase it out of their speech like smoking or nail biting. Science points the other way.

“ce n'est pas poli de dire des gros mots”

Not a poor vocabulary

breaking bad

The oldest cliche says people swear because they cannot find the right word. Two American researchers decided to actually test it.

One minute, three lists

Kristin Jay and Timothy Jay asked people to name, in a minute each, words starting with a given letter, then animals, then swear words. Published in Language Sciences in 2015.

Best at swearing, best overall

The people who produced the most swear words also scored highest on the other categories. Fluent cursing came packaged with fluency in general.

“le juron n'est pas un pis-aller linguistique”

Liars swear less

Gilad Feldman's team ran lab experiments, millions of Facebook messages, and state-level data in 2017. Every angle gave the same answer: heavy swearers lie less.

“les personnes qui jurent le plus mentent le moins”

Raw beats polite

A swear word exists to push out an emotion with no social filter, which leaves little room for the polite lie. Blunt speech reads as transparency, not vulgarity.

The big picture

Swearing is one more tool in a well-stocked vocabulary, and the people who use it tend to be the more honest ones.

Read the original on Psychologies

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Life is short. Keep it sweet. Respect others' opinions and be kind!

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