The very military expression "Stand at ease" is used in Cockney rhyming slang to refer to one of the things the British manage to make better than the rest of the world, cheese.
Apart from the odd French and the occasional Dutch, all the best stand at ease is from jolly old England (and Caerphilly from Wales!).
Let's use it in another sentence
"Your plates smell like mouldy stand at", which translates to "My my your feet stink".