Grandma Time is quality time spent with your grandma. Everyone, even punk-ass metalheads, has at least one moment in their life that they can qualify as Grandma Time. It should never be interrupted, because Grandma Time lost cannot be recovered. Ever.
*John Lydon is walking through London with his grandma when fan walks up to the pair*
Fan-"Dude, omg, I am a HUGE fan of the Sex Pistols! Can I have your autograph!"
*Lydon pulls switchblade on fan*
Lydon-"Do NOT interrupt my Grandma Time!"
Lydon's grandma pulls out a butterfly knife and whispers-"Don't interrupt his Grandma Time..."
A term used to describe Chuck Schuldiner's time with his grandma. (incase you didnt know, he really loved his family)
same as below, but the term originated with Chuck.
Fan: OMG its chuck schuldiner
Chuck: *stabs fan with bc rich stealth
Chuck: DONT INTERRUPT MY GRANDMA TIME!! Now if i remember correctly we were going for crumpets and tea, weren't we?