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Adaptation of the Marine Corps motto: Semper Fi (Latin for Always Faithful). Used to describe the general Marine attitude (i.e always be flexible with plans cause something will change that will fuck up your night) towards the constant changes that are rampant in every Marine unit.
Marine 1: Hey man, go easy at the bar tonight, just found out we have a CFT at 04
Marine 2: Oh well, semper gumby
by DevilDogPOG October 27, 2011