The Meaning of Sod's Law

Early documented uses seem to use the word as synonymous with smear. This suggests someone who is smarmy is also slick or slippery. sod's law is a British axiom that basically means if anything can go wrong, then it definitely will go wrong. For example, dropping your toast, it always falls butter side down. But there are plenty of blokes who fancy themselves as being classy like James Bond but they just come across as being smarmy,. don't you think?