noun, feminine/kɔ.tœʁ/plural: cotteurs
a raised border between a road and sidewalk; a kerb
“Ton char est pris sous la neige sur le cotteur.” — Your car is trapped under the snow on the kerb.
Probably borrowed from English cutter. Other theories posit a derivation from cotter (“to support with a strut or stay”), accotement (“verge [of a road]”) or simply from côté (“side”) + -eur.