Arrr! Matey!
Besides being Walk Like a Pirate Day, today is also Talk Like a Pirate Day.
The optimal way to walk like a pirate is with a peg leg. To acquire said wooden leg, though, probably is not worth the effort unless your body is already so configured.
So you likely want to find a sub-optimal way to walk like a pirate. The best way I can think of is to wear long pants and not bend your leg at the knee as you perambulate.
Face it. No one is gonna call you on this anyway, especially if you're already talking like a pirate.
If the stiff knee thing is just too difficult, you can settle for huge amounts of swagger.
Watch a pirate movie or two to find examples of swaggering. John Wayne movies will work too, pilgrim.
I encouraged videos of your talking like a parrot yesterday. Talking and walking like a pirate videos would be even better.
Best of all would be if you talked and walked like a pirate and had a buddy on your shoulder talking like a parrot.
I would pay good money to see that.