by l5a5u5r5a5 February 4, 2009

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.
by diabolicuss July 19, 2009

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 8, 2013

by YesBitchImmaChica June 29, 2019

by idc👑 June 23, 2019

Don't make me megatron you!
by Clyde Harper February 8, 2009

Something that is huge or really big, usually used as if something is really bad (because Megatron is the bad guy in Transformers)
by Cerpin Taxxt October 28, 2006
