It’s a combo of mother fucker & fuck stick.
It’s to be used when regular cuss words won’t work so you have to sprinkle some razzle dazzle in your vocabulary. Ideal use is for online video games.

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)

It's a person who isn't worthy to have sex with a mother, but is low as to have sex with a male possing to be a female (tranny) who is a mother type of figure in there life.