Collins COBUILD Advanced Learner's English Dictionary - go off with

1. If someone goes off with another person, they leave their husband, wife, or lover and have a relationship with that person. I suppose Carolyn went off with some man she’d fallen in love with. PHRASAL VERB: V P P n 2. If someone goes off with something that belongs to another person, they leave and take it with them. He’s gone off with my passport. PHRASAL VERB: V P P n