When you shit a long turd out that goes down the toilet bowl, but is still long enough to protrude out of the water.
Man I iceberged that last shit, go take a look, I haven't flushed yet, bring your camera
A floating giant ice living in the ocean, shaped randomly, the famous iceberg was the Titanic Iceberg from Titanic 1997 film, sometimes they can be broken apart, the example of an iceberg breaking is the gif below.
Iceberg right ahead!
-- From the Titanic 1997 film
The act of placing a block of ice too big to flush just before someone has to defecate in it.
Suddenly stricken with a case of food poisoning, Rebecca was shocked to see a block of ice too big to flush in the only available toilet. She had no choice but to leave a muddy iceberg.
When you take a monstrosity of a shit to where a small portion is protruding out of the water.
Guy 1:"Dude you alright? You were in the bathroom for like 30 mins."
Guy 2:"Yeah I'm alright, I was Dropping An Iceberg."
Guy 1:"The fuck did you just say?"
Vanilla Ice Cream and Guinness Float. Invented at Cadet Officer School - Maxwell AFB, Alabama by Maj MB, LtCol OF, and Maj JK. This beverage was created amidst the gathering of colleagues and educators, pilots and businessmen/women and minds of leadership development.
We ran out of Root Beer for a Root Beer Float…I guess I could just make an Irish Iceberg to drown my frustrations.
A silly phrase shouted by a Titanic lookout when an iceberg was spotted
Lookout: Iceberg Right Ahead!
First Officer: Hard a starboard!
2 and a half hours later
Oh fuck everyone drowned or got hypothermia