Top Definition
Abbreviation used in the Field Artillery of the US Army. Official definition is: "Close Station, March Order". Unofficially: "Collect Shit, Move Out".
1st Sergeant: "CSMO!"
Section Leader: "You heard Top! Let's un-ass this AO."
#military slang #ao #csmo #us army #march order
dari IGCommissar Jumat, 06 Desember 2013
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