Vertical Bacon Sandwhich Share definition Flag another term for a vagina. Most popular in British slang "Dude, I completey devoured her vertical bacon sandwhich the other night" Vertical Bacon Sandwhich by xFuck Your Motherx December 19, 2008 0 0 Get merch Get the Vertical Bacon Sandwhich mug. Buy Now — $32.95 See more merch