The Times journalist Januszczak upset Fielding by claiming that Channel 4 hiring him to review Damien Hirst's Tate Modern exhibition was "like draping a naked woman across a bonnet to sell a car".
In response, Fielding said: "yesterday Times art critic Waldemar januszczak Layed into me on twitter because channel four asked me to interview Damien Hirst x (sic)
"I thought it would be fun if me and all my followers went onto his Twitter and insulted him. Just to be childish . x "
He added: "Teach the horrible snob a lesson x Whose with me? X X X X Fly my beauties fly X X x Ha Ha ha ha x Ha ha ha ha ha ha ha this is gonna be brilliant x x x x x
"Ha Ha Ha ha this is a Frankenstein moment. Oh well he shouldnt have been so mean . He was rude as toast x"
Abuse from Fielding's fans, much of it retweeted by Januszczak, included suggestions that he is a "gitface", "poopy pants", "a c**t", "a pedophile rapist", "still a virgin", "a total scum bag", "smelly s**t arse", a "batty crease", "a stuck up piece of s**t", "absolute poo face", "self righteous tw*t" and "made from s**t sperm" with "a face like a hobbit in a headlock".
Fielding said: "Just spent five minutes pissing myself at the insults ha ha ha best day ever! x x really creative verbal pummelling x"
In response, Januszczak said: "Dear Noel Fielding fans, thanks for the laughs. You're hilarious! Noel could learn a lot from you!"
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Move through our gallery of Damien Hirst's Tate Modern exhibition below: