The African river-hog, Potamochœrus penicillatus. See cut under Potamochœrus.(noun)
The South American capibara, Hydrochœrus capibara. Also called tailless hippopotamus and short-nosed tapir.(noun)
The Century Dictionary (Public Domain)
Use "water-hog" in a sentence
"That's barely a quarter of the average daily use in the US, a global water-hog that uses nearly 500 gallons a day per capita."
"The mayor is justifiably vexed about the occupiers ruining the pretty grass, but rather than simply replacing this water-hog, perhaps the city could take a moment to consider some smart design alternatives."
"Bad habit: Running a water-hog showerheadNew routine: Using a low-flow showerheadSavings: 2.5 gallons or more per minute"