For the past year-and-a-half, Murphy has been sporting an impressive looking mullet, which now measures 15cm in length from the bottom of his hairline.
"Some of my friends had mullets, and so did All Black Jack Goodhue. I really liked the look of them so decided to have one myself."
While Murphy thinks he looks pretty good with his full head of hair, he has decided to shave it off as a way to raise money for a cause close to his heart.
"I've decided if I can raise $700 then I will have my mullet shaved off. So far I have raised $160 so it is getting close."
Murphy, who lives in Manaia, is fundraising as part of this year's Shave for a Cure initiative which raises money for the charity Leukaemia and Blood Cancer New Zealand. The national charity is dedicated to supporting patients and their families living with a blood cancer or a related blood condition.
"I noticed they haven't got a cure for cancer yet so wanted to help, and shaving my mullet off was a good way to do it."
He says while his teachers have praised him for the idea, he isn't sure what his friends might think of his new look after the shave.
"They haven't said much about it yet. I will miss having it, but it's a good cause to help."
Anyone can support Murphy's efforts and get him closer to his goal by visiting the Shave for a Cure website and looking up Murphy Farrell: www.shaveforacure.co.nz/murphy-farrell.