That'll Be The Day

The speaker responds to a partner’s threats to leave with confident-sounding disbelief. They insist that a goodbye would be so painful it would feel like the end of life, while also claiming the partner does not truly mean to go. The repeated refrain gives the song a playful, emphatic mood, but beneath the confidence there is a hint of fear about being left.

“That’ll be the day” means “that is when it will happen,” but here it leads to an exaggerated claim: the speaker would die if the partner said goodbye. This is hyperbole, not necessarily a literal threat. “Cupid shot his dart” draws on the familiar image of love striking someone like an arrow; the speaker uses it to suggest that the partner has fallen in love, so leaving should be impossible. The affectionate references to hugs, kisses, and “turtle doving” reinforce the closeness the speaker believes they share.

The lyrics can be heard as lighthearted teasing between lovers, especially because the speaker repeatedly dismisses the partner’s warnings as lies. Yet the insistence may also reveal insecurity: the partner says “maybe” they will leave, and the speaker answers by turning love into a guarantee. It is unclear whether the speaker is simply joking or trying to reassure themself; both readings fit the lyrics.