The Mad Butcher had "the wind taken out of his sails" by comments from a Labour MP who said she would "never go near him again".
Despite Darien Fenton's comments that she chooses "not to buy stuff from those who support Tories", the politician said she was not calling for a boycott of the Mad Butcher chain, which Sir Peter Leitch founded.
The debate began three days ago when, after hearing Sir Peter advocate John Key on Radio New Zealand, Ms Fenton posted on her Facebook profile: "So, Mad Butcher. You have a choice, but so do I."
When others asked Ms Fenton to explain her comment, she called Sir Peter a sycophant and said: "[He was] sucking up to John Key big time. I'm never going near him again."
Ms Fenton said she was upset that Sir Peter had recently been complimentary towards Mr Key and that the Mad Butcher had invited the Prime Minister to join him to watch the Warriors play at Sunday's NRL grand final.