Lyric discussion by Katkatpuss 

Cover art for Apocalypse lyrics by Cigarettes After Sex

To me the verse "My lips, your lips, apocalypse" has always been a metaphor for a desire and passion so powerful that they could destroy worlds.

My Interpretation
Positive
Subjective
Passion
Desire
Powerful
Worlds
Destruction
Metaphor

@Katkatpuss my thoughts exactly, agonising listening to it