A student taking a class on a satisfactory/unsatisfactory, or pass/fail, grading basis. Such a student can get away with putting very little effort into a class.
Slang that stands for "mother fucker", popularized by the New Zealand folk-comedy band Flight of the Conchords, who also have a show on HBO. It allows the speaker to convey the same meaning as the traditional term without technically swearing.
How many mutha uckers are too many to kill, mutha ucker?
A really ugly person, as you may notice the 'f' from fuck has been moved to the beginning of 'ugly'. This word is quickly becoming popular with more and more people using fugly as a lone word.
Oi ya fugly ucker get ova ere before i stick a steel pipe up your arse.