Best definition
Your Helen Keller
A specific person you know that you purposely put boxes in front of so they trip and fall over them.

Person 1: Sometimes I place cats and shoes in front of my mom. So, when she gets up to walk, she trips on them. Haha, it’s funny, I know, and it’s probably not very nice, but she is MY Helen Keller.

Person 2: Haha, Your Helen Keller. How silly. You’re a silly Person 1… *smiles*