The guilt you feel when you have not visited your grandparents in a while. Intensified by the fact that when they inevitability die of old age, you don't want to feel like you didn't see them enough while they where alive.
Mum: "When was the last time you saw your grandparents, they won't be around forever you know"
You: "Stop giving me grandparent guilt, I will go see them soon."
Save the roaches from your joints and combine the resonated pot into a new (more potent) joint. If planned correctly, this technique can be repeated endlessly, producing high-potency grandparent joints and even great-grandparent joints.
"Looks like we've got enough here for a Grandparent joint, anyone down?"
Someone who is expendable in a crisis, who can be sacrificed for the greater good. Based on the request from Texas Republicans to let old people die, during the 2020 COVID-19 crisis, so young people can go back to work.