An American citizen, typically well-educated, who wastes his or her employment opportunities by holding a sub-par job or not working, drinking malt liqueur and claiming moral supremacy to others based on first-hand observation. Amero Trash is typically located in college towns and are strongly affiliated with English departments.
The inability to concentrate on the simplest of tasks, because you're about to piss yourself.
Especially troublesome in career fields where intense concentration is required and you're stuck, literally, with "nowhere to go". Some such careers are pilot, surgeon, paramedic, and speed shooting competitor.
While driving to an emergency:
Paramedic 1: "Hey man, I gotta take a piss real quick before we get to this call." (Jumps in the back)
Paramedic 2 (Driver): "What the..."
Paramedic 1: "Yeah man, didn't want to show up to a CPR with bladder brain!"