yomp, v. — Green’s Dictionary of Slang

yomp v.

[orig. Royal Marine term for marching with weapons and a 120lb pack across appalling terrain in extremely hostile conditions on the premise that once this ultimate in route marches is concluded, the troops will be prepared to fight a battle at the other end; poss. Norwegian word used by skiers to describe the crossing of obstacles. The term gained widespread currency during the Falklands War of 1982]

to march, to walk (in difficult conditions); also as n,; thus n. yomp, omping n.

1999		Indep. Rev. 10 Aug. 7: The Arabs can go yomping over the desert in the mornings.
2000		Observer 9 Jan. 28: Fifteen minute yomp to check-in.
2004		C. Brookmyre Be My Enemy 238: Dinner, a few bevs and a hard day’s yomping.
2004		B. Parris Making of a Legionnaire 67: Most British squaddies will tell you that when they embark on a ‘yomp’, they are told how long it will be .