H
| "Hard case" | Tough guy; someone who is rough and tough |
| "Hard knocks" | A tough break |
| "Hayfoot, strawfoot" | Command used to teach recruits difference between left and right |
| "Here's your mule" | Term infantry used to insult the cavalry because they didn't use their feet for their own transportation |
| "Hoof it" | To march |
| "Hop, step, jump" | Early 2-wheeled ambulance |
| "Horizontal refreshments" | Term meaning to have sexual relations with a prostitute |
| "Hornets" | Term for bullets as they whizzed past a person's head |
| "Horse collar" | Term for a soldier's blanket roll |
| "Horse sense" | Smart or on the ball |
| "Hospital rats" | Person who fakes an illness |
| "Housewife" | Sewing kit |
| "How come you so" | Home-brewed or camp-brewed beer or other alcoholic beverages |
| Hunkey dorey" | Everything is great or terrific |