Yes, you've taken to mucking your work—doing it in a most slovenly way.
But what's the good of my mucking about in a filthy uniform?
We got the idea from the British Tommy, only he calls it "mucking it."
"I don't mean to have any one else mucking around," growled Dunn in answer.
Roving and changing and mucking about in crowds—no; I was fed up with that when he sent me away ...