To be fair.......
This was 21 years ago....and no one ever said "period". It was "On the plop", "Having the decorators in" or my personal favourite "Werewolf time".
(Designated Slagger, Thu 15 Sep 2011, 13:46, 2 replies)

I always thought it was "blob"
But "werewolf time" has me giggling
( Extinct Jesus Dossier "...I think it counteracts Hitler's magic...", Thu 15 Sep 2011, 14:54, closed)

on the plop
I used to call it "blackcurrant jam time" or "Japanese flag time"
(IHateSprouts is baking a huge pie shaped like an enormous pie, Thu 15 Sep 2011, 17:14, closed)