Bokeh (暈け or ボケ) is a a Japanese term for the subjective aesthetic quality of out-of-focus areas of a photographic image. It refers to those beautiful magical out-of-focus light, with different shapes and colors that you found in the background of many photos taken with large aperture ( such as f1.8 or larger ). Normal bokeh usually has a circle shaped like this
one, but I've been playing around with my lens to create a love shaped one. ^^