Booted up

[bartholomew]

Hi

I have encountered the following adjective. What does it mean?

The Eastern european immigrants on the tube all booted up for a hard day's work probably in construction...

[Chillum]

wearing working clothes.

[HeratthePC]

as in, putting on their work boots.

[Octavius]

the clue is in the question.

As opposed to being 'suited and booted' which means you have got your good clothes and shoes on for a night on the town.