Romantiqueo is playful reggaetón slang built from romántico and the suffix -eo, meaning romantic flirting, affection, or acting romantically. Near the end of the song, DrefQuila contrasts it with bellakeo, presenting the track’s mix of flirtation and romance in a catchy, distinctly musical word.
DrefQuila has a crush, and he is not shy about it. She has "una mirada bien coqueta" (a really flirty look), and he admits he has already written her a couple of songs: some "tratan sobre su amor" (are about her love), and others are about her "cu-". He cuts the word off, but you can guess. It is cheeky and a bit much, which is the point.
The title comes from the sweetest line: "Puse tu vocecita de despertador" (I set your little voice as my alarm), so "ahora todos los dÃas comienzan mejor" (now every day starts better). Despertador means alarm clock, and vocecita is a cute diminutive of voz (voice). He also says she cured a pain "que no me quitó ni el doctor" (that not even the doctor could take away).
Watch the Chilean and reggaeton slang: mota is weed, pa' is short for para, bebecita is a pet name for a girl, and perreando means grinding on the dance floor. The outro jokes that they are "los CEO del bellakeo y del romantiqueo" (the CEOs of getting frisky and of romancing), which sums up the song's two moods.