I was mulling this over while I was out working in the yard - I knew I'd seen it around here. That's poke salad. If the berries were ripe that would give it away immediately. They're quite distinctive.
You can't just eat it, it requires careful harvest and preparation. You should be careful handling it.
I found a site with information and photos - but keep in mind, do your own research if you plan to use it for anything or to handle it.
The stalks, mature leaves, flowers, berries and root of the pokeweed contain compounds that have some pretty scary effects on the human body. Drugs.com lists the symptom of pokeweed poisoning to include â€œsevere stomach cramping, nausea with persistent diarrhea and vomiting, slow and difficult breathing, weakness, spasms, hypotension, severe convulsions, and deathâ€. They also note that â€œsevere poisonings have been [sic] reported in adults who ate mature pokeweed leavesâ€ so make certain to get only the youngest leaves from the plants before the flowers form.