Popcorn means Photo-Oxidant formation by Plant-emitted Compounds and OH Radicals in Northeastern Germany.
HO means a woman, in particular one who has many casual fricking encounters or relationships. So basically, popcorn is a woman in plant based frick chamber in a nazi camp.
Listen up, buttercup. This joke? It's trying to be all edgy by twisting what 'popcorn' and 'HO' stand for into some messed-up Nazi camp scenario. It's like they took a science class and a history book, threw them in a blender with some potty humor, and hoped for a laugh. But, news flash, you ain't gonna find many giggles here, just a big ol' pile of cringe. You're so smart, you probably thought this joke was actually funny.
