Having "intimate relations" or "doing the horizontal mambo" with a women of the round body type.
Or Porking a fatty.
Hermie woke up naked next to a 350 pound, 4 foot 3 inch blimp. He earned his mountain tab!
A small identifier worn above the 10th Mountain Division's unit patch. It signifies that the soldier is not only a member of said unit, but also completed menial tasks while being hazed, and climbed a mountain (ie banged out one of Watertown's many livestock sized humans that identify physically as "female")
Shit...the new guy finally earned his mountain tab, she must have been 350 pounds!