pan-loaf

In Scotland a pan loaf is bread baked in a tin rather than on an open shelf, giving it a softer crust all around — considered posher than a plain loaf. But the real cultural action is in its second meaning: in Scottish slang, 'pan loaf' rhyming-slang for 'talk' means speaking in an affected, posh, or overly refined accent — putting on airs. Telling someone they're 'talking pan loaf' is calling out their pretentiousness with a bread metaphor, which is deeply Scottish.