The first thing that comes to my mind when I hear "Tank" is all those Tank-endings laugh laugh laugh

Somehow it's become a Lois and Clark Dictionary word

TANK ENDING - A sudden twist in any part of the story (usually in the climax/ending of the story); a deathfic; an irretrievable/ unsolvable/ bizarre situation in a story which usually requires the Wendy antidote laugh

CG
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( oo * Work) + (1 * Hubby) + (2 * Kids) = 0 * Time