A follower of the British Comedy act of the 70's and 80's called the Krankies. Husband and wife, Ian and Janette, played a father and son act (Janette played the small boy)
Thier cabaret work was a lot more risque than the later tv work typified by thier appearances on Krackerjack.
Krankles typically were children at the time and missed the adult humour which they later picked up when watching reruns.
More info on the Krankies can be found at the Wiki of the same name
You are not just a fan of the Krankies you are a "Krankle"