Office Kitchen Thief

1st Definition: Somebody who takes food or drink from their startup's kitchen with the intention to consume it at home versus at the workplace. Not a real thief.
2nd Definition: Somebody who takes food or drink labeled with one of their coworkers' names.

Bob: My Instacart delivery isn't going to come in time. I'm going to be a office kitchen thief for today and just grab a few things