Hot water bottle 

As seen in the Korean web novel 'FFF-Class Trashero', a sexual partner (usually in the case of the main character Kang Han Soo referring to a woman), basically a 'bed warmer'.

"A beauty, whose body was ideal to be the highest-grade hot water bottle, thus shouted while looking down from the top of a majestic fortress covered by ice and snow." - FFF-Class Trashero Chapter 65

"His girlfriend, who had played the role of a hot water bottle, had disappeared, while he was kidnapped to the continents of Fantasia again." - FFF-Class Trashero Chapter 75

Hot water bottle by jerrythebattlepus December 19, 2020

hot water heater 

What many people (even news anchors on well-respected TV news channels!) call a water heater.

You don't want to heat water that's already hot for Pete sakes!! It's proper to call it a 'water heater' or you can even call it a 'hot water tank' -- but never a 'hot water heater'.

{Latoya}: Gary, I think the hot water heater is busted; I can't get any hot water out of this faucet to do the dishes!

{Gary}: Latoya, we don't have a 'hot water heater' -- we might have a hot water cooler, a water heater, or a hot water tank, but no hot water heater! Which of those do you want me to check?

hot water heater by Telephony August 16, 2012

in hot water 

in serious trouble, epecially with the law or one's superiors

If you keep skipping school,you will be in hot water.

in hot water by Light Joker April 3, 2006

hot water and flakes 

Flakes are instant coffee, that you put in hot water to make coffee. Made popular by Eric Jalbert in a Instagram live stream. Jalberta.

Random guy in livestream: What are those flakes your putting in your coffee?
Eric J.: THATS THE COFFEE

At tims: I’ll get a large hot water and flakes with 2 cream and 2 sugar. Thanks Bud

hot water and flakes by I<3Head February 10, 2020

hogwater 

Adjective.

Absolutely garbage at the game.

Squadmate 1: Bro come help me troll this kid, he's hogwater at the game.
Squadmate 2: Aight bet.

hogwater by BigManBeanie March 26, 2022

Hot Water 

1. the opposite of cold water
2. trouble that you find yourself in after you have a few tastey beverages

Nona found herself in hot water after a bro ho tried to dance with her in front of the shit hot band.

Hot Water by Fav 80s girl October 20, 2011

hot water cornbread 

A southern delicacy that is simple to make, and makes a great addition to any meal. Ingredients include sugar, salt, bacon fat, corn flour, and of course, some hot, boiling-ass water. Grannies and Nannies tend to make the best batches.

Thanksgiving at Granny's house was the shit! She had some of the best hot water cornbread I've eaten all year!

hot water cornbread by yo-yo baiter July 13, 2007