The term 'OG Kush' is generic; you'll mostly see it attached to various phenotypes and hybrids like Tahoe OG, Jedi Kush, Ghost's OG, etc. There's not only some question as to the origin of the strain, but also its name; some claim that 'OG'; stands for 'ocean grown,' while others say it's 'OG' as in 'original' or 'original gangsta.' But lineage and terminology aside, the general characteristics you should look for are a strong piney/lemony-cedar scent mixed with fresh-turned spring soil and a hint of rubber, like a new pencil eraser or pair of skate shoes. Anything less isn't worth putting in your pipe. The fresh-soil-and-pine flavor really comes through in most phenotypes, with varying degrees of tartness. This sativa-leaning (but often indica-labeled) strain has gained its reputation not because of the rappers who name-check it in every track, but because it is potent, powerful and delicious. If aliens came down from outer space and wanted to know what cannabis was about, this is the strain family that they would take back home.