I accidentally disturbed a very large leaf footed bug yesterday while doing some weeding and I cannot get the memory of the odor it released out of my head. This is worse than having some cheesy 70s song stuck in the brain - at least in the musical case you can replace the stuck song with another less obnoxious one. The scent is probably not how you are imaging it if you haven't run into one of these. Think of a sweet, yet rancid, strong, cloying scent and you are on the right track. Kind of like a vase of decayed gardenia or a rancid almond. A note of something almost pleasant, twisted and overpowered by an "offness" that is hard to describe. A very odd odor.
Anyway, that scent has been stuck in my olfactory memory all day. Lucky me.