What is Rufty-tufty?
1.
Adjective: Describes the appearance of soldiers in the field, who are usually have worn equipment, dirty uniforms, and unofficial additions or modifications of their kit. This makes them look tough and professional. People wanting to imitate that look will batter their new equipment, grow stubble even if they have the chance to shave, and so on.
Derived from 'rough'.
"Are you growing that beard because your chin is cold or do you just want to look more rufty-tufty?"