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!"
Former members included Stella, Scarlett & Alexis, however most recently Castile decided it was time for Megatron to move on, he felt it would be best if the three girls left paving way for other actors e.g. Joe Batt & Rebecca Sims(Hangman)