A cat who has been boarded or trapped on something (originally a boat), and thus dies of starvation or thirst in that area.
Child: What the hell? Mooooooooooooooooom. Our cat's dead in the trunk!
Father: THAT'S what that horrid smell is!
Mother: Damn it, that fleet cat's gotta go then.
Father: THAT'S what that horrid smell is!
Mother: Damn it, that fleet cat's gotta go then.
by The one above all February 1, 2010