A mormon, or member of the Church of Jesus Christ of Latter-Day Saints who is especially dogmatic about his/her beliefs. The word morgbot is a combination of a reference to the Borg of Star Trek fame (Resistance is futile) and the word robot. A morgbot is a non-thinking, trained, and yes rather annoying mormon who is trying to assimilate others.
You know, Peter/Molly just isn't the same after his/her mission. (S)He doesn't want to watch R-rated movies or watch sports on Sunday. (S)He's become a bit of a morgbot. Just wants to talk about church all the time.