What is bokeh?
You know it when you see it. Its that soft, blurry, buttery background that lets the key parts of your photo come into contrasting sharp focus. Correctly pronounced, its 'boh-keh', but many just pronounce it like a group of flowers. Either is fine.
Tip: If your camera has an aperture mode (often an 'A'), select it and open your f-stop to its widest setting. Counter-intuitively, this is the smaller number, like F2 or so. When you shoot this way, you'll get the shallow depth of field associated with bokeh.