The term over the top is used when something is done in excessive amounts or beyond reasonable limits. It is sometimes (in the UK at least) shortened to O.T.T. The term was first coined during the Great War when the troops became engaged in trench warfare. When the troops were sent over the trench wall, the order given would usually be over the top lads and best of luck. The over the top tactic gained little or no land, but it saw thousands of men slaughtered as they crossed no-man's land.
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