What is Grandma Candy?
1.
a noun used in substitution of a name to inform others that this person is clutch/consistent. Just like the sweets at your grandmother's house, this person is always there, especially when you need them.
Chad: "Dude, I'm not playing
beer pong tonight, I'm in a slump."
Marshall: "Just team-up with Pat, he's grandma candy, he doesn't miss."
See