Yomp

Yomp is Royal Marines slang describing a long-distance march carrying full kit. The origin of the word is unclear (one suggestion would interpret it as an acronym of Your Own Marching Pace). It was popularized by journalistic coverage in 1982 during the Falklands War. It has been compared to the term yump used in rally-driving in the sense of `to....
Found on http://en.wikipedia.org/wiki/Yomp

Yomp

[Naval Acronyms and Slang] To force march with a heavy load
Found on http://www.encyclo.co.uk/local/21733

yomp

to carry heavy equipment over difficult terrain
Found on http://phrontistery.info/y.html

Yomp

Yomp is slang for to walk hard and with vigour.
Found on http://www.probertencyclopaedia.com/browse/ZY.HTM
No exact match found