Is there a term for someone who barely moves their arms whilst walking?
Solution 1:
This question brought to mind a toy we had when I was a kid. It was made popular on the TV show "Romper Room" Plastic cylinders (like small coffee cans) with loops of cord attached - and you'd stand on them, hold the cords taut, and clomp around with your arms at your sides.
If you called this person a Romper Stomper I'm pretty sure folks of my generation would understand. (Sorry about you young'uns - you have so few amusements that don't involve electronics) (US)