What is "mullmuzzler"

James LaBrie (formally MullMuzzler or James LaBrie's MullMuzzler) is the progressive metal solo side project by James LaBrie, the lead singer of Dream Theater, before recording under his own name in 2005. The record company would not allow LaBrie to use his own name, so he created the name of MullMuzzler. LaBrie coined the word MullMuzzler and defined it as: to gag or silence an individual's thought before it can be expressed in any manner. For the followup, he negotiated the right to use his name although still unable to simply credit it as his solo album.