Christmas drinker

noun3

1. •
   (UK, Ireland) Someone who only drinks alcohol very occasionally.
2. •
   (UK, Ireland) A near-teetotaller; someone who drinks very small quantities of alcohol.

   • Even though she was just a Christmas drinker, a birthday drinker, a genteel port-and-lemonade drinker, she gave up alcohol altogether after the accident. — 1991
3. •
   (UK, Ireland) Someone who binges at Christmas, but rarely or never visits pubs at other times of year.

   • “Ninety-eight per cent of those who have contacted me have got the joke,” he said. “The other 2 per cent are Christmas drinkers.” — 2014