Justin doesn't like it when you call him by a name that is not his actual name

in

Like that time Tom and I spotted that license plate that said "MCDUNA" and we were like, "Hey, there's your last name, J," and he corrected us, several times, on the proper spelling of his last name. And then, while lying around rejoicing in the glory of a summer Monday holiday this morning, J sniffles and, C.M.R. - Sneezy McSneezums.

J.A.M. - Justin McDonough.