To loaf or goof around on the
job. Supposedly an old union term describing laborers (or more specifically, bricklayers) who were going so slow, it was as if each
brick were made of solid gold.
One can alse be referred to as a "goldbricker".
Dude, I spent all day at work goldbricking - surfing the web, making long distance
phone calls - basically just picking my
ass.