The antonyms for the phrase "plug in to" include words such as disconnect, unplug, detach, disengage, remove, and withdraw. Disconnecting or unplugging means to physically remove a device from a power source or to cut off communication with a computer network. Detaching or disengaging implies removing or separating one thing from another either physically or emotionally. Removing or withdrawing means to take away or extract something from a place or situation. The opposite of plugging in to can also mean to exclude or ignore, as in rejecting or avoiding an opportunity, idea, or relationship.