The guy who came up with this calls it "Bad Baggage." The idea is that you choose a dumbbell of suitable weight, mark out a straight-line course of some distance, and then walk that course carrying the dumbbell in one hand. When you get to the end of your marked line, do 5 suitcase deadlifts
. That's one round. Then turn around, switch hands, walk back, and repeat at the other end.
The metrics for tracking progress are dumbbell weight, course length, and time (number of rounds completed in a given time, or time to complete a given number of rounds). Today I used a 50lb dumbbell on a 70-foot course (one side of my gym to the other), for 11 rounds in 10 minutes.
One nice thing about this workout is that you can use any suitable weight you have handy - a bucket of cat litter, a bag of potting soil, even a real suitcase. Be prepared for your traps, glutes, spinal erectors, and forearms to be very annoyed with you after this.