List of United States Marine Corps Acronyms and Expressions - I

I

• I & I – Inspector-Instructor, an active duty Marine assigned to supervise the training of a reserve unit.

• IAW – In Accordance With, term often used to denote compliance with published orders or procedures.

• IED – Improvised Explosive Device, bomb constructed, set, and detonated in unconventional warfare; the acronym can be modified to denote a specific type of IED (such as VBIED, a Vehicle Borne IED).

• IFNAH – Insurgent formerly known as HAJJI, An acronym devised to be politically correct so as to not insult or inflame the local indigenous population; often considered derrogatory.

• IG – Inspector General.

• IG Inspection – official inspection of a command or unit by the IG or his representatives.

• ILBE – Improved Load Bearing Equipment, the newest iteration of personal combat gear, utilizes the PALS, replaced MOLLE.

• in country – phrase referring to being within a war zone.

• incentive/individual training or IT – physical training used as a punishment, especially in recruit training, sometimes nicknamed "incentive torture," "indoor tennis," or getting "thrashed/bent/slayed/destroyed" by recruits. See also pitting & quarterdecking.

• inkstick – pen

• Irish pennant or IP – loose thread, string, or strap on a uniform or equipment that detracts from a perfect appearance.

• Iron Mike – originally a nautical term for a gyrocompass; name for various memorial statues, such as at Parris Island, SC, Quantico, VA, and Belleau, France; nickname bestowed on Marines who score a perfect 300 points on the Physical Fitness Test; nickname for a company or battery named "M or "Mike" in NATO phonetic alphabet.

• IRR – Individual Ready Reserve, branch of the reserve that most former servicemembers fall under upon the end of active service, may be called to involuntarily return to active status.