Tambour translates to "drum". While it's a common instrument, its appearance in this song is particularly evocative and symbolic.
In the context of "Congo", the drum represents the heart and soul of the Congolese culture and identity. When KeBlack sings "Lâche mon tambour" (Let go of my drum), it's a powerful plea for his country's freedom and sovereignty, making it a deeply meaningful and memorable word.
KeBlack writes a homecoming to a country he has never seen. He greets it like a person, "Bonjour mon Congo" (hello my Congo), and admits the strangeness straight away: "Tu m'as jamais vu, moi aussi" (you've never seen me, me neither). Raised in France with Congolese roots, he asks for "quelques minutes" (a few minutes) of pause, then decides the pull is too strong: "Mais c'est impossible" (but it's impossible).
The verses get concrete as he arrives. "J'aperçois les chutes d'eau" (I see the waterfalls) and "Le soleil tape mon chapeau" (the sun beats down on my hat) put him on the ground, and by the bridge he has made up his mind: "Je n'veux plus te quitter" (I don't want to leave you anymore). The chorus turns into a chant to dance to, "Serrez fort, ça c'est mon pays" (hold tight, that's my country), repeated until the claim sticks.