Déhanchement refers to the swaying or swinging motion of the hips, often used to describe a confident, rhythmic way of moving while dancing. It's a more specific and vivid word than simply saying "movement," since it zeroes in on exactly which body part is doing the swaying.
In the line "Et mon déhanchement viril" ("and my manly hip swing"), the singer humorously emphasizes his own macho dance moves on the dance floor. The word adds a playful, self-mocking image to the song's lighthearted take on line dancing culture.
Picture a hopeful romantic strolling into a Friday night line-dance class, convinced that this country-style two-step is the perfect shortcut to meeting cool new gals. The singer quickly discovers that most of the students are named Yolande rather than Stéphanie — code for “the golden-age crowd.” Instead of flirting, he pivots to perfecting the Honky Tonk and Cowboy Boogie, shaking his hips like a prize racehorse and racking up contest trophies.
What begins as a quest for love turns into a celebration of unexpected friendship and self-improvement. Surrounded by his spirited, silver-haired dance partners, he learns to bake cookies, simmer stews, and play cards, all while strutting in crocodile boots with a “virile sway.” Love might have slipped through his fingers, yet he emerges as the undisputed king of line dancing — proof that the best rewards sometimes arrive when our original plans take a hilarious detour.