be (all) dressed up in Christmas tree-order
be (all) dressed up in Christmas tree-order
old-fashioned Of soldiers, to be in full marching order. Originated among British soldiers in World War I. Come on, fellas, we're gonna get screamed at if we're not all dressed up in Christmas tree-order by 0600 hours. The soldiers were all dressed up in Christmas tree-order and moved through their formations for the crowd. It's a special occasion, so we're all expected to be dressed up in Christmas tree-order.
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