The Bishop of Birmingham's Buttocks
When I was a little Fluffles, my mother and I used to play a fantastic game on long car journeys. You might know this game as "The Emperor's Cat", but trust me, this version's better.

So, we'd be on a long journey, we'd have been silent for a while, and just when I was starting to get bored with the scenery, she'd just quietly say, with a completely straight face and her eyes firmly on the road, "The Bishop of Birmingham's buttocks are ample."

I would then respond with, "The Bishop of Birmingham's buttocks are ample and belligerent."

She'd think for a bit and say, "The Bishop of Birmingham's buttocks are ample, belligerent and cavernous."

I'd think for a bit and say, "The Bishop of Birmingham's buttocks are ample, belligerent, cavernous and dreamy."

And so on until you get to the end of the alphabet or forget all the words. This game can keep any number of people occupied for ages. It's even more fun if you use adjectives that aren't commonly associated with buttocks (such as "xenophobic", which is the only thing anyone ever comes up with for X).

My mum and I aren't close, but she's the only person in the world who would know what the fuck I was on about if I randomly said, "The Bishop of Birmingham's buttocks are ambidextrous".
(grandmasterfluffles Come to my Armageddon party on, Thu 20 Nov 2008, 23:49, 2 replies)

Heh
I love the sound of this...have a click.
( snee held his breath since, Fri 21 Nov 2008, 8:36, closed)

Vaguely similar
My friends and I would sometimes play a similar game, though for us it was making alliterative phrases, which had to make some kind of sense. Often done at the local diner, first person to miss a part would buy the drinks for the whole table.

Obviously, this would often lead to some particularly odd phrases ("Furiously Fornicating Firemen" was one that springs to mind)
(Morgan is a damn dirty hippie, Sat 22 Nov 2008, 23:22, closed)