A sniggler is someone who takes the parking spot you wanted, or who otherwise does something perfectly legitimate, but which nonetheless inconveniences or annoys you.
to intentionallypull your ownpants down sit on a solid surface of some sort and fart. sniggledorfing is done in order to make the most noise and or best noise out of your fart. works well on metal wet surfaces.
after swimming sal had to fart so he squatted over the pool and sniggledorfed the meniscus of the water