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- Oct 2, 1998
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DX is an abbreviation for Direct Exchange, used in the Army to signify that a piece of equipment is going to be gotten rid of. If you break your issue gear, you take it down to CIF (the central issuing facility), DX it and get new stuff. Since soldiers jokingly refer to themselves and their bodyparts as equipment owned by the military, when someone is DXed, they are gotten rid of or removed from the area.