The act of evenly distributing creamy Jif peanut butter all over your ball sack and having your dog slurp it off your nuts while you beat your cock like it owes you money.
Nick was rushed to the hospital after his dog mistakenly bit his nutclean out of his sack.. he clearly should have not been Jiffin it.
The act of dressing oneself and an accomplice in furry animal costumes and having them piss, shit & come on you. The soiled party is known as the "jiffee"; the soiler as the "jiffer".
As seen in "Stars Wars: The Return of the Jedi":
C-3PO - "They seem to regard me as some sort of...god. It'd be alright if I could only stop them jiffing all the time, look there they all go again!"
A weeb that normally only Valorant and never gets out of his house, and also hates touching grass and most of the time he can be seen touching his meat and this kind of person most of the time listens to Vocaloid and is addicted to Deco*27 and Wowaka, and this kind of person is a big hypocrite.