A person who is extremely strong, square shoulders, not necessarily tall but makes up for it with leg power and strength. He's naturally built and also see the word manchild, as the "True Tank" has a goatee by the age of 14 or 15. Legs are huge, and has some real guns on him.
There are tanks usually found in sport. The typical tank comes from a physical game, like American Football, Ice Hockey, Australian Rules Football, and both codes of rugby but there is also the odd cricket player.