mackermoo is a term used for someone who always wins, pwns hardcore noobs, gets all the girls and gets more ass than a toilet seat. contrary to popular belief it has nothing to do with cows. Its also the gamertag of this guy i faced on xbox....i still have nightmares about that match
The definition of muckleboob is big idiot. The word itself is defined by combining Muckle which is an ancient scottish word meaning "Large amount" and boob, which is a dullard, oaf, or useless person. It can also be used to describe a disasterous outcome.