Wiktionary
a. (context UK slang English) Temporarily away from work, usually due to sickness, supported by sickness benefit.
Usage examples of "on the club".
They were interested and seemed somewhat friendlier, but Kristy still wasn't sure whether they'd call on the club again.
The rest of us would be happy to discuss school or the latest issue of People magazine for hours at a time, but Kristy keeps us focused on the club.
If I'd been one of them and trying to work up an interesting angle, it would have only been natural to include at least a line or two on the club's dark history.
He had the greener cocked and ready for trouble, no doubt thinking that Royale might be staging another attack on the club.
Unfortunately, that happened to be a time of day when neither Mr Hatch nor anyone to whom he had deputed authority was on the club premises.
She had been posing on the Club grounds and in scenic spots of the island in breath-stopping bikinis and sun clothes, for a bald gnome of a fashion photographer.
It had cost Ken Oroshi more than four million dollars to join Koganei Country Club, the most prestigious in the country, where green fees were three thousand dollars-a-month, and then it was only because Ikusa sat on the club's owners' committee that Oroshi jumped the one-hundred-plus names on the waiting list.
I saw a tarpon that would go about ninety pounds hanging on the club rack.
Rufo cared nothing for the puny attack, and Pikel learned the hard way, to his dismay, that his enchantment had expired on the club.
By the time the bugbear came back down, still standing but quite winded, Pikel was behind the monster and had realigned his grip on the club.