DR Congo
gros mot
“big word”
Meaning
a long, learned word
Elsewhere
mot savant
Explanation
A gros mot is a swear word in France. In much of West and Central Africa it is the opposite, a long, bookish word.
Example
Il adore employer des gros mots pour impressionner tout le monde.
He loves using long, fancy words to impress everyone.
Origin
Origin uncertain.
Where
DR Congo
Chad
Senegal
Côte d’Ivoire
Burkina Faso
Togo
Benin
Niger
Mali