to miss (something), to get lost
Escuchamos atentamente para no perdernos ni una palabra.
We listened carefully so as not to miss a single word.
Lo que nos faltaba, perdernos esa cena.
The last thing we needed was to miss that dinner.
— State and Main (2000)
Creo que vamos a perdernos el Hullabaloo después de todo.
I think we're going to miss the Hullabaloo after all.
— Moonrise Kingdom: Amor Infantil (2012)