Tomátela is a very informal and somewhat aggressive slang term that literally means "take it" (referring to yourself, as in "take yourself out of here"). It's a strong way to tell someone to leave.
In the context of "Nunca Más," the singer uses this phrase to emphatically tell an ex-lover to get lost after they try to come back. It perfectly captures the song's theme of moving on and not wanting to deal with past relationships, making it a memorable and impactful word choice.
Marama's "Nunca Más" is a super catchy cumbia track from Uruguay about a person who's had enough of an ex trying to come back. The singer is totally over it, asking, "¿Con qué cara me vienes a hablar?" [With what face do you come to speak to me?]. It's clear they've moved on and are not interested in revisiting the past, especially after feeling used.
The song really hits home with that feeling of finally being free from a bad relationship. The singer even says, "Por suerte de mi vida te borré" [Luckily I erased you from my life], which is such a strong statement! It's all about realizing your worth and telling someone, "Nunca más, ya no quiero verte nunca más" [Never again, I don't want to see you ever again]. You can almost feel the relief and confidence in their voice as they wish the ex "suerte si tú te vas" [good luck if you leave].