The singer expresses intense attraction and excitement toward someone. He says he is truly in love, admires the person’s manner, and wants them close. The mood is playful and energetic, growing more urgent as he insists he wants the person “right now,” not tomorrow.
“Knock me out” and “right off of my feet” are idioms meaning that the person amazes or overwhelms him; they are not descriptions of a literal fight or fall. “The way you walk” and “the way you talk” point to the person’s whole style and presence. The repeated request to “shake it” likely invites dancing or lively movement, while also adding flirtatious excitement.
The lyrics are direct and repetitive, so their main effect is less a detailed story than a burst of desire and enthusiasm. “I’m in love with you” suggests sincere feeling, but the urgent, physical language also emphasizes immediate attraction. The song leaves open whether this is deep, lasting love or a moment of intense infatuation; both readings fit what the singer says.