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The Military Occupational Specialty designator (MOS) for the US Army Infantry, the main land combat force and backbone of the Army. They are responsible for defending our country against any threat by land, as well as capturing, destroying and repelling enemy ground forces. The rest of the US Army supports the infantry.
Damn, ever since Bob54321’s wife fucked that 11B, he has had a case of the ass.
by PunchDaClown September 13, 2018
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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The most bad ass mother-fucker to walk the face of this earth. The only MOS in the military that actually matters. The Blue cord you wear will make women drip like an ice cream cone at Fort Benning in July
OMG ! that is an 11B. Hurry up and run back to the village to fuck our goats!
by uw-stoutnickk December 13, 2018
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