A Bunkulus is another word for a large mechanical machine that someone is put inside of. The word was created when two idiots were playing a game from the franchise 'Space Marines' and one of them called a Dreadnaught a 'Bunkulus.'
"OMG THEY PUT ME IN THE BUNKULUS!"
"LOOK AT THAT BUNKULUS!"
"Ayy, that's a big Bunkulus!"