This is a love song about a toxic relationship. They are too focused on each other to notice the destruction they cause each other.
The title “Robbers” refers to how the lovers are robbing each other of happiness and chances in this world apart from one another. They can’t move on and grow in love because they are so caught up in their toxic relationship.
The 1975 frontman, Matty Healy said the following about the song:
“ ‘Robbers’ was originally inspired by my love of the Quentin Tarantino film True Romance .