Smoke on the water 

Old folks from the country, generally in the south, use to say on nights where there was mist/fog over a swamp, pond, river or lake that the devil was raising hell under water. The saying "there is going to be smoke on the water tonight" came from that and means something is about to go down or someone is getting ready to raise hell. The saying predates the rock song by deep purples but I doubt they intended that meaning in their song. I believe their song is about a fire at a hotel.

If them MFs don't have my money theres gonna be some smoke on the water. I.e. I'm gonna raise hell.

Smoke on the water by supascience August 4, 2018

soda in the water cup 

When a cheap bastard or "badass" kid orders a free water and fills it up with soda in a fast food restaurant. Also a sick song by Attila.

"Bitch at mcdonalds just saw me put soda in the water cup."

"Omg I'm rank 2 badass cuz I put soda in the water cup!!!"

"Dude I just listened to soda in the water cup. Sickest shit ever. Fronz is a beast."

soda in the water cup by Sparrow136 July 17, 2014

Smoke on the Water 

A rock song by Deep Purple; also a must-learn for guitar players - although mayhaps some of them seem incapable to do so.

(Some guy demoing a nice guitar with dazzling playing skills).
Comment: Nice. But can he play Smoke on the Water?

Smoke on the Water by lucasiada April 21, 2019

Shark in the water

"sharks in the water" refers to the other women in a relationship that a girl knows are there.

-"Why're you leaving him? You guys were so good together."
-"He thinks I'm too stupid to realize there's a shark in the water, I know he's going over some other girls place."

Shark in the water by crgouhsnf July 11, 2011

Smoke on the Water 

An influential rock song telling the story of a real event in Montreux, Switzerland.

Down there is the first verse.

We all came out to montreux
On the lake geneva shoreline
To make records with a mobile
We didnt have much time
Frank Zappa and the mothers
Were at the best place around
But some stupid with a flare gun
Burned the place to the ground
Smoke on the water, fire in the sky

Smoke on the Water by StetanIslendar November 5, 2007

still a fish in the water 

Still a fish in water means that you feeling like you blend into the crowd to much and you want to stand out more.

In my giant middle school I don't stand out at all I'm still a fish in the water.

still a fish in the water by Zoe B. July 12, 2017

Salt The Water 

The act of ejaculating onto your partner whilst they are bathing in a tub

Hey babe, I'm sitting in the tub, can you salt the water for me?

Salt The Water by Tyulalapxnns July 26, 2019