Megatron
An obese female, usually capable of consuming large amounts of "energon" such as chips, pizza, hamburgers, etc. in a single sitting. Megatrons tend to be rather obnoxious or loud, often being heard over most talk in a room.
"Bro, I was trapped behind this megatron at Wendy's. She was so loud, I couldn't hear anybody else in the room!"
Megatron by hurr durr herp derp January 12, 2012
Megatron
Megatron by Fallicd_joe June 25, 2012
megatron
When your baby, child or infant misses a number two only to have a poo explosion a few hours later that escapes the nappy/diaper confines.
Katie ran to the change room holding her nine month old son at arms length after a megatron escaped from his pants.
megatron by Mr Sinister6 January 9, 2010