1 definition by Gene Mitchell
Common phrase used by U.S. Marines with the military occupational speciality of 1833 (assault amphibious vehicle crewman) or 2141 (assault amphibious vehicle repairman) to explain to the world how they feel about other U.S. Marine occupations. The phrase "YAT-YAS" translates to "You aint tracks then you aint shit".
by Gene Mitchell June 14, 2008