One of the most commonly used synonyms for the phrase "go poof" is to disappear suddenly or vanish into thin air. Other similar phrases include to evaporate, fade away, dissipate, dissolve, and dematerialize. These phrases all suggest something that once existed suddenly disappearing without a trace. Other expressions that are closely related to "go poof" include to vanish into thin air, get lost, disappear without a trace, and go up in smoke. While these phrases may have slight differences in meaning, they all imply a sudden and inexplicable disappearance, leaving behind no trace or evidence.