This is a loaded question, and I feel I need to explain it to avoid confusion.
First, you need to check the spelling of berry, it’s very important. Never say “Yes” unless you know they’re spelling it b-e-r-r-y, not b-u-r-y, otherwise you could be headed to the bottom of a pit.
Once you’ve checked the spelling of berry, the question is simple. It has three possible meanings:
1: The person asking to berry you is asking if they can give you a berry. This is the most common meaning of the question, and it’s generally asked when you aren’t eating a berry.
2: The person asking to berry you is asking if they can throw berries at you so you can catch them in your mouth. This is usually done with blueberries, a berry small enough to catch in your mouth, but still solid enough to maintain a smooth trajectory when thrown.
3: The final meaning of this question is less well known. This time the person asking to berry you is asking if they can treat you like a berry. This involves chopping you up and juicing you in order to make a delicious berry smoothie.