Pin-Up.

A girl on a wall.

I realise now that 'pin-up' is, these days, a little-used word from yesteryear.
And, on that subject, we have a Spanish girl working with us who recently explained to me that she learned a lot of her English from listening to Leonard Cohen songs. She had just asked me, seeing a single hob-nob left on a plate, 'why is this chocolate biscuit forsaken?'.
It made me feel very warm inside.