Any one of several a.i. machines in the form of humans (mainly female) that were created to serve their owner by performing simple to complex activities. The usefulness of a persocom is directly proportional to its size. The larger persocoms are capable of emulating comlex emotions and have self learning capabilities.
" I got my persocom to do my taxes for me, it was a breeze"
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.