Tip of the iceberg 

Only the part of something that can be easily observed, but not the rest of it, which is hidden. (Referring to the fact that the majority of an iceberg is below the surface of the water.)

"The problems that you see here now are just the tip of the iceberg. There are numerous disasters waiting to happen."

Tip of the iceberg by shoshannafeelings July 10, 2014

Mexican Iceberg

When tip of my poop sticks put of the water

I just shit so much, I left a Mexican Iceberg

Mexican Iceberg by nme619 February 4, 2015

russian iceberg 

When a guy shoves an ice cube in a girl's vagina and pushes his penis in behind it.

"Man, my girlfriend and I tried a russian iceberg last night. It was incredible."

russian iceberg by Ashleigh May 13, 2005

White iceberg 

When a man ejactulates in the bath tub and the semen floats to the surface

Who left all the white icebergs in the bath tub?

White iceberg by Goose buster September 8, 2016

tip of the fecal iceberg 

Slang reference to describe all of the so far unseen, unknown and future stinking shit that the Trump Administration has dumped into the world due to greed.

Oh my dear, this little Ukrainian problem is only the tip of the fecal iceberg!

tip of the fecal iceberg by Dr Bunnygirl December 13, 2019

poopoo iceberg 

When you take such a big dump that poo rises above the water line and there's a ton of poo underneath, just like an iceberg.

I just took a huge dump and left a nice poopoo iceberg in there for everyone to look at.

poopoo iceberg by seeen October 4, 2006

Dirty Iceberg 

When you dump a poo so massive that the tip of it emerges out from the water. Like an ice berg would emerge from the cold rigid sea.

Jacob did you see the size of that dirty iceberg I just put in your toilet?

Dirty Iceberg by Canadian Jewbag August 19, 2019