Nos comió is a powerful, metaphorical phrase from the line "No sé como el tiempo nos comió" (I don't know how time ate us up).
While comer usually means "to eat," here it's used to express how time passed incredibly fast, consuming the moments the singer should have spent with his loved one. This creative expression turns a simple verb into a poignant image of lost time and longing.
Mexican singer Junior H puts down a heavy, honest track about being stuck miles away from the person who keeps him steady. The title is not an exaggeration: he spells out that he literally travelled 1004 kilómetros (623 miles) just to catch a glimpse of her. In the lyrics, he admits the physical separation makes his daily aches so much harder to manage ("Sé que la distancia no ayuda / En el dolor que siento al día" [I know distance doesn't help with the pain I feel each day]). When he admits "el tiempo nos comió" (time ate us up), he is using a classic Spanish idiom that means time slipped away or moved way too fast before he could spend enough of it with her.
He also leans into regional phrasing when he shouts "Y ahí te va chiquitita / Puro Junior H" (There it goes for you, little girl / Pure Junior H), treating the track like a direct dedication right in the middle of his vocals. He admits to having "días grises" (grey days) where the ache returns, but he counters that by holding onto faith that the separation is temporary. He even describes feeling totally great with the phrase "al 100" (at one hundred percent, or at 100%), pointing out that she is the only person who knows how to read his mood without even looking: "Sabes lo que siento y sin mirar" [You know what I feel, without even looking].