same as below, but the term originated with Chuck.
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?
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..."