1. noun, a fart that barely seems like fart at all, is silent, but smells like the gut dumpster behind a slaughterhouse on a hot summer's day after someone has already given you a dirty sanchez. The farter often barely recognizes that he/she has released a black pearl until they themselves are caught up in its swath of destruction. The black pearl also refers to the apparent tiny volume that the fart occupies. 1cc of black pearl gas is roughly equivalent to an equal volume of VX nerve gas in the amount of panic and terror it can create.
1. I was in a meeting today and thought I'd let a little one slip, but I totally forgot about the onion rings I had the night before...bad move, total black pearl. There was a box with my name on it when I got back to my desk.