mud on one's boots en · NOUN
Etymology
An allusion to various lines of work where a person is physically present on site, e.g. construction as opposed to architectural design.
Meanings
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(figuratively, uncountable) Practical experience.
Cook never attained meaningful practical experience, but Herron loved site mud on his boots.
2008, Kenneth Allinson, Architects and Architecture of London, page 390:The civil engineer, for all his skills, is still often known as the man with mud on his boots.
1966, Teaching Engineering Design: Proceedings of the Conference on the Teaching of Engineering Design held at Scarborough between 13 and April 1966:I used to place architects on a higher level, well above someone like me who works with his hands and gets mud on his boots.
2001, Stephen S. Saucerman, Moving to Commercial Construction, page 96: