OAP
A word for an old person who is not nice. They usually yell, have bad hair, and complain about everything.
My grandpa is an OAP. He yells at the mailman and eats cake for breakfast.
I saw an OAP in the park. He had a bad haircut and a colostomy bag.
My neighbor’s OAP mom yelled at the TV and threw her zimmer frame at the dog.