To give someone or something a special, status or privilege for something done before the new arrangements are made
I will not grandfather one religious leader for his deeds as a child.
(v.) To let someone keep doing something that's been banned or discontinued, because they were granted this right before the ban was imposed. To make an exception for a veteran and let him keep doing things the old way. Used in the past participle.
You can't get a license to drive a 200cc motorcycle here nowadays, but you'll still see old Smokey riding his around. He's grandfathered.
When someone soaks their hands in water, making them wrinkly, and gives you a handjob.
Jesse gave me a grandfather last night, it reminded me of my grandpa.