Just that really, makes my teeth itch. Why do I imagine a crowd of middling aged, middle class women sitting with their glasses of wine who would look down their noses at other women gaily gushing about how they can't wait to get the kids home from school for Buckie O'Clock or White Lightening O'Clock.
I fall way more into the former description and no doubt drink too much wine at times but I just hate the phrase and proud clamouring to be the one start wine o'clock earliest in the day.