(n.) after an intense workout, the gooch or taint area becomes sweaty and moist. The sweat coats the gooch hair resulting in a swamp-like feel. Thus derives the name swamp gooch. Swamp gooch is most common when playing sports in boxers.
A very thick layer of dust that builds up on your CPU or GPU’s heatsink as a result of neglecting to clean the inside of a computer and also requires a brush to clean off.
Apparently this computer had a bit of swamp gooch because the dust is so thicc that the heat sink looks like it has mange.