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8.
Huge.
Darren's Penis.
Wow, have you seen Darren's penis? It's a huge Megatron!!
by Fallicd_joe June 22, 2012
5 44
 
1.
Leader of the Decepticon Transformers. Transforms into a Walther pistol, but rarely actually does so in the TV series on account of this being a particularly useless thing to transform into. A psychotic, maniacal genius, Megatron is pure of evil and huge of gun.
"Megatron: sort of like Darth Vader, but simultaneously not."
by Popcorn December 01, 2003
383 144
 
2.
Megatron is a Canadian trademark of Megatron Communications inc. Montreal Quebec Canada.
Since 1989, Megatron is sending fax broadcast in Canada, USA, Australia, Europe, China, Hong Kong, etc.
Megatron Fax Broadcast
Megatron Communications inc.
Megatron Net
Megatron Emailling
Megatron Faxing
Megatron Faxbroadcasting
Service Megatron
by Megatron Communications inc. December 04, 2011
107 15
 
3.
Evil leader of the Decepticons. His goal is to rule the universe and destroy everyone in his path....even one of his warriors.
Join me and I shall send you into battle, Defy me and I shall send you to oblivion!!--Megatron (from transformers Energon) quote
by Aimee January 10, 2005
147 112
 
4.
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 06, 2005
126 126
 
5.
Nickname for Detroit Lions wide reciever Calvin Johnson. Has this nickname due to the fact he has huge hands that resemble a Decepticon.
Guy 1: What's the point of watching the Lions, you know they're gonna suck as usual.

Guy 2: Don't be so hasty on your decision, Megatron has been bringing on the TD's recently. They might actually make the playoffs this season.
by viva riolu October 20, 2011
71 100
 
6.
A penis that exhibits the "grower" characteristic of significantly expanding and lengthening upon erection as opposed to the "shower" characteristic where it is already near maximum size at rest and does not get much bigger upon erection.
Hey, baby. How you doing? Don't be fooled by the Decepticon in my pants. My Megatron is full of destructive force capable of making you/your Starscream.
by BaboonKiller December 08, 2013
2 37
 
7.
A crazy ass bitch who will stop at nothing to get fucked up. A good friend, but also a good friend who is always willing to fuck some shit up. The girl who gets high before night class and brings fruit loops. The girl who almost quit lacrosse to go on spring break, because she wanted to fuck shit up so badly.
"Did you tron last night?"
"Oh shit, Megatron was out last night"
by thebabymaker January 23, 2013
4 43