We found one dictionary that defines the word mud on one's boots:

General (1 matching dictionary)

1. mud on one's boots: Wiktionary

Definitions from Wiktionary (mud on one's boots) ▸ noun:  (figurative) Practical experience. ▸ Words similar to mud on one's boots ▸ Usage examples for mud on one's boots ▸ Idioms related to mud on one's boots ▸ Wikipedia articles (New!) ▸ Words that often appear near mud on one's boots ▸ Rhymes of mud on one's boots ▸ Invented words related to mud on one's boots