"All the weight"

My mom was dating this guy a while back, and he brought us up north to meet his family. His dad was an awful person, to put it nicely. 

As my brother and in were waiting in the car to leave, he came over to say goodbye. He stood at my window, looked inside at me, and yelled to my mom's boyfriend, "No wonder you have a flat tire, all the weight's on this side of the car!" 

I was barely 13.