Miénteme is the command form of the verb mentir (to lie) combined with the pronoun me (to me), creating the dramatic phrase "lie to me". It's a powerful and emotionally charged word that you don't often hear.
In the song, Eladio sings "dale, miénteme, que me creo todo" (go on, lie to me, I'll believe it all). He's expressing a deep vulnerability, suggesting he's so captivated by this person that he'd rather believe beautiful lies than face a reality without them. This single word creates a compelling narrative and makes you want to understand the full story.
Eladio Carrion's "TQMQA" is a super sweet and direct love song. The title itself is an abbreviation for the main hook: "Te quiero más que ayer" (I love you more than yesterday). The whole idea is that his love for this person is growing every single day. He says he loves her more than yesterday, "Y mucho menos que mañana" (And much less than tomorrow), because tomorrow he'll love her even more. It's a simple, powerful way to describe a love that's constantly getting stronger.
He makes it clear that this isn't about money or material things. He tells her, "No, no, no me hables de dinero / Que eso yo lo puedo hacer" (No, no, don't talk to me about money / I can make that). What he really wants is her affection and to see her happy. He's ready to commit completely, even telling her he's done with other girls: "A las otras unfollow" (Unfollow the other girls). He's putting his past behind him and focusing only on her, right now, today.