Pendientes literally means "pending," like a task you still need to do. It's the key to this song's title, "Cosas Pendientes," which translates to "Unfinished Business."
In the lyrics, Maluma uses it to describe the unresolved romantic tension and feelings between him and his ex. When he says they have "cosas pendientes," he's talking about all the unspoken words and unresolved emotions, perfectly capturing the feeling of a story that isn't over yet.
Colombian reggaeton star Maluma brings pure club drama to "Cosas Pendientes" (Unfinished Business). He spots his ex on the dance floor partying with someone new: "Te vi en la disco perreando con otro" (I saw you in the club dancing closely with another guy). But the second the DJ plays their shared anthem, she makes eye contact and laughs. For Maluma, that single look breaks her cover completely: "Ya con eso todo me dijiste" (With just that, you told me everything). Even though she acts distant in front of the crowd ("te haces la antipática" / you act unfriendly), he claims the tension between them is impossible to hide.
The heart of the track revolves around the phrase "quedaron cosas pendientes" (there were unfinished matters left between us), listing promises like romantic dinners and passionate nights that never got settled. Maluma gets cocky, telling her that trying to move on with the next guy was useless because his mark on her is permanent, "como un tatuaje, eso ya no lo borra nada" (like a tattoo, nothing erases that now). He even admits to scrolling through her photos alone late at night. It is a bold, addictive track about catching an ex lying to everyone about being over you when the spark is clearly still alive.