1. a prehistoric shark, that measured up to 12 metres in length.

2. an exceptionally mega impressive donn thing.
that is the most megalodon board I have ever ridden.
by simon warren November 17, 2003
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A huge, extreme or excellent Mafia boss.
Joe got shot because he owed money to the Megalodon.

"Hey, I can’t wait to see that new gangster film about the Megalodon."

She was both terrified and excited when the Megalodon asked her out for dinner.

"Joe, don't look that guy in the eyes!... he's the Megalodon."

The FBI finally managed to lock up the Megalodon... on TAX evasion.
by Paulhully August 13, 2018
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A species of prehistoric shark that could reach lengths of 15.3-18 meters and weigh up to 50 tons. Megalodon is a member of the genus Carcharocles and a member of the family Otodontidae. Its teeth were 7 inches long and it had a bite force stronger than a Tyrannosaurus Rex. Megalodons bite force was probably the strongest of any animal!
Person: That's a weird-looking rock.
Other person: That's not a rock, that's a megalodon tooth.
by EurypTrey April 21, 2020
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A huge 18-meter shark, nobody knows if this shark is a myth, but it's said that a huge tooth from this beast has been found in a area where a ocean used to be. (AKA the ocean dried up from all those years.) The tooth goes up to a height of 7 inches. This shark was bigger than a whale shark, and would eat other sharks and giant squids.
"Have you heard of the Megalodon shark?"
"Isn't that a legend?"
"Nobody knows, but if it's real, it's extinct, so it can't hurt animals or humans!"
"But I heard it's still alive... and there's proof..."
"Woah..."
by Ironically Incredible April 5, 2015
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n. a giant shit. one that excedes normal size of the bowel complex.
I had 3 cups of coffee and I just dropped a vicious megalodon.
by Djnasm September 26, 2007
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a prehistoric awsome man eating shark that might still live today
ahh its a megalodon
by animal jam lover October 13, 2015
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When something you dont like happens, and instead of saying "what the fuck" you say ultra megalodons.
"What the ultra megalodons"
by Casey fitzweiner January 14, 2008
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