John Lynch and others: Ah Ha–Acronym time from the US Army (these have been around since I was a slick sleeved private)

FUBAR: F***ed Up Beyond All Recognition

WAHUBA: We Are Highly Unimpressed by Amateurs

FIGMO: F*** IT Got My Orders

Muaaaah: Origin Unknown; supposedly comes from the experience of the 2d Cavalry during its days in the Seminole Campaign; but since the 2d Cav is my home Regiment, I never hear the story when I was a LT