The one guy that is always in the hot tub by himself, observing other peoples conversations. The hot tub guy will always be the first person in the hot tub, and the last one out of the hot tub. The hot tub guy usually makes others feel awkward since they cannot converse normally with him there. Usually characterized by massive amounts of body hair and a beer belly.

A novelty shot, typically served to an unsuspecting victim as either a gag or as punishment for turning 21. To make the shot, one first fills a rocks glass with house vodka, and then proceeds to suck up a small amount of milk with a straw, lowers the end of the straw into the bottom of the glass, and slowly releases the milk while pulling the straw up and out, with the end result resembling semen being suspended in the water of the hot tub, thus you have the sex in a hot tub.

One partner urinates into the other's bellybutton. The urine pools up in the bellybutton and creates a warm pool (Hot Tub).

A method of heating up cheap sake to warm temperatures to improve the taste to acceptable levels. Simply place the sake on the steps and mount the bottle against the corner to keep the opening from being submerged. Hot tub sake should be consumed after at least 20 minutes of incubation in the hot tub.

A group of guys sitting in the hot tub that are often characterized as being loud and obnoxious. They start every sentence with "Dude!" and think they are hot shit because they are hanging out together with their shirts off.

when there isn't anything going on, so you and a few buddies get really drunk and hook up in a hot tub, but none of you remember the next morning.

1: The act of searching for a hot tub in a nearby area and doing whatever it takes to get in it...whether it be jumping fences or avoiding mean dogs or hotel security.
2: Not stealing a hot tub; more like stealing and enjoying the hot water and company of friends. Taking what you wish was yours.