Leader of the deceptacons. The guy who mortally wounded Optimus, losing his identity to Unicron as an indirect result.
"As you should know by now, Megatron is very hard to kill," -Megatron
by AdmiralDavidov August 6, 2005
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Megatronned (v.) - The process of having a corpse dumped into the bottom of the sea, as seen in Transformers.
Bin Laden was totally megatronned in the Arabian Sea after he was killed.
by Daniel Wiggity May 3, 2011
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Leader of the Decepticons and arch-enemy of Optimus Prime. Looks like he could kick everyones' asses but never does because he's actually Optimus Prime's bitch.
People that Megatron could beat in a fight:
by Mat_el_sexy_band_geeek March 20, 2008
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(adj.) is PRIMARILY used for describing the terms "badass," "the fucking shit," "insane," "mind blowing," etc.

Made famous by Australian Jason Ellis.
"Dude that beer pong shot was so fuckin MEGATRON."

by DayGlo Dax Drilling August 5, 2008
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Wow. I wish I could grow up to be like megatronic mommmy!
by mega December 23, 2004
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a pussy whiped son of a bitch who doesnt have time to play video games with his freinds.
x1: "Mega get on vent, we have a match"
mega: "Dude pat is coming over and she says i will get some"
x1: "you nig"
by fetus February 12, 2005
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Based on the battle record of the evil Decepticon leader from 'Transformers', Megatron means to wreak havoc when able, but to turn tail and bitch out at the first sign of adversity.
A: "I own this map!"

B: "We're making a comeback!"

A: "Fuck, I quit!"

B: "Fucking Megatron."
by diabolicuss July 19, 2009
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