My parents are going up to the Twin Cities for a bowling tournament that my dad is part of this weekend. And the one of the suggestions was that I go over and stay with my grandparents for the weekend, but there is one problem. My grandma tends to comment and insult me about anything. Every Sunday, we go to their house for dinner and because I don't eat salad like everyone else, she says, 'So you're not a rabbit.' And just she said as just we were about to eat some ice cream, you'll get fat. When I tried to be sarcastic on her caring for my weight, she said she didn't get a shit about it. I don't think I can handle her for two days, though I often hide downstairs.
Wow that sucks. I don't have a relationship like that with my grandmother so I can't be too useful on advise. Sorry :(
My grandma's similar, but she's like that to my dad. Here's what you do: get your mom to make you a big pot of something, like spaghetti sauce or stew, something you can stand eating for two or three days. Then stay home those days and don't have any parties. If you party, your parents will never leave you home alone again.
Get your parents to let you stay home and tell them precisely why you do not wish to stay at your grandparents'. Use the tools at your disposal.