Curtains.

I had dinner tonight with Claire. Lovely, exquisite Claire. Who's just broken up with her boyfriend for the second time. I've never met him, luckily enough.

We both ordered the beef cheeks and it occurred to me, not for the first time, that 'beef cheeks' sounds vaguely rude and I spent a second or two working out why.

It's about half-way between "butt cheeks" and "beef curtains".