The act of defacing another human being by taking a dump on their face; curling out a long one around their mouth in the style of pretentious beard/moustache combos preferred by Belgian Jazz enthusiasts. Also referencing Belgian chocolate. A great party piece for those falling asleep at Christmas.
Like a moroccan moustache, but on the chin as well
Alex's slowness in responding to product queries caused considerable frustration amongst the sales team, and when he passed out at the Christmas party he awoke sporting a belgian beard.