Something that you love and hate at the same time, like Schrodinger's cat which existed in a state of being both alive and dead. The quantum superposition of the two emotions (love and hate) may collapse at some point in the future.
Schrodinger's Marmite can be used instead of the term Love Hate Relationship
Bill "I really like watching YouTube videos"
Ted "I have a love hate relationship with it, for me it's Schrodinger's Marmite"
Bill "oh you are just too clever for me"