Thesaurus

(n) : a container for liquids or gases, typically with a volume of several cubic metres; a armoured fighting vehicle, armed with a gun and moving on caterpillar tracks. For details see the Wikipedia article on "tank"

(v) : to fail or fall (often used in describing the economy or the stockmarket); to degenerate or decline rapidly; to plummet; (Online RPG) To attract the attacks of a monster, so that the other people in the group can defeat the monster in question more efficiently