Dating does when they date someone for a bit, disappear without explanation, and then reappear, also without explanation.
Submarining is what someone
If the person you've been seeing ghosts on you and then three months later casually texts you asking if you want to go see a movie, that's submarining. It's basically as if they've been underwater and out of sight for weeks or months only to reemerge in your life, leaving you confused and frustrated.
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