When a male has neglected throughly cleaning his penis for a good couple or three weeks leaving a fishy stench around the head of the chode. Though not a recognised medical condition , yet, many suffer from the disease. Tang is reminiscent of but is not limited to the following fishes; Cod, Haddock, Mackerel, Tuna, Salmon, Sardine, trout, red mullet etc. Common amongst both lazy people and top swordsmen in middle England, Scotland, N Ireland and Wales.
"Listen kid, I was sat stroking my schlong in the living room last night and man my cocky-fish Itus was playing up something nasty. My nan walked in and asked if someone had been cooking fish!"