Oh, Grampsie! is a fictional comic by Beverly Bliss, and it is featured in the Diary of a Wimpy Kid Do-It-Yourself Book.

The Strip

A boy is using the computer with his grandfather and he tells him that in order to use the computer, he had to just move the mouse. The grandfather, thinking it meant moving a real mouse, said that he didn't want to touch a rodent if that's what it took to become "modern". The boy laughed and said, "Oh, Grampsie!".