'bandos' originates from English (slang), specifically the clipped form 'bando' from the word 'abandoned', where 'abandoned' meant 'left behind or deserted'.

'bandos' changed from the slang 'bando' (a clipping of 'abandoned') and later developed into the plural form 'bandos' used in hip-hop, trap music, and social media to refer collectively to such places.

Initially, it meant 'abandoned building', but over time it evolved into the current slang sense of 'abandoned building used for illegal activity, squatting, or parties'.