Belfast-born broadcaster Colin Murray is a man of his word.
The football-mad television and radio presenter is making good on this promise to run through Belfast in a green mankini - and he wants 100 members of the public to join him.
Before Northern Ireland began their qualifying campaign for France 2016 Murray shared a playful tweet with his online followers.
"If Northern Ireland qualify for Euro 2016 I'll run thru Belfast in a green mankini, without any shame whatsoever," he wrote.
He has revealed he is still up for the challenge and wants others to also don mankinis, bikinis and swimming suits on Boxing Day at at 8.30am for a lap of the city centre to raise funds for the Frame Football Association.
Colin said he was looking for "100 fellow Ulstermen and women to stand up beside him".
"I had two options," he added. "To do it at 4am on my own like a coward or pull on that mankini loud and proud. I've been involved with Football For All for ages, and this is a chance to raise some serious cash.
"I'm buzzing that we qualified and I'm hellbent on turning my stupid tweet into an amazing event."
Women are being encouraged to get involved in a run Murray says will be "a right laugh".
"Registering is easy, and we will have one central fundraising page," he said.
"And ladies, I'm afraid you aren't safe either. I'm asking men to wear mankinis and women can join in too in a green bikini or swimsuit."
The green mankini was made famous by comedian Sacha Baron Cohen's 2006 comedy character Borat.
Now the revealing garment, a nod to the team's colours and the Green And White Army of supporters, will be showcased on the streets of Belfast in spectacular style this Christmas.
Some of Colin's famous friends are also being roped in to take part, with one mystery star already signed up.
"I already have a famous musical son from Northern Ireland signed up, but I'm coming for them all," he said.
"Frampton! Wheeler! Lightbody! Gillespie! Healy! Don't you dare avoid my calls!"
The run is all for a good cause.
Frame Football Association in Northern Ireland brings children with physical disabilities together to play an adapted form of the game suiting their needs.
"Come on," Colin said.
"Almost everyone is off work, it's the season of goodwill and it's a chance to have a proper laugh along the way
"It'll be Baltic on the day, but the walk (sic) will be brisk and short and the result will be warm and wonderful."
To make a donation, visit https://crowdfunding.justgiving.com/colinmurray and to sign up for the Boxing Day challenge visit (you must be 18) sign up by visiting the IFA website.