The autistic cry heard when in the vicinity of Amphibious Assault Marines. You Ain’t Track, You Ain’t Shit. Originated from grunts calling their amtrackers “shitheads” during the Vietnam War and the Trackers affectionately adopting the title.

I just sat through 8 hours of death by PowerPoint and I think the only think more retarded than that was the fat dude in coveralls at the chow hall that screamed YAT YAS when I asked what unit he was with.