The odor of these was not so much skunk-like as garlicky, the epitome and concentrate of all the back doors of all the bad Greek restaurants in all the world. And finally he surpassed himself with something that had a dimethylamino group attached to a mercaptan sulfur, and whose odor can’t, with all the resources of the English language, even be described. It also drew flies.
John D. Clark
I G N I T I O N !: An Informal History of Liquid Rocket Propellants
[In addition to the strong propensity for experimental rocket fuels to produce craters, metal debris falling from the sky, and dissolved and/or scrambled body parts many of fuels also smelled extremely bad. But not all. One left behind the smell of lemons.—Joe]