Mutant fuck
A person who is such a total fuckwit that they have ascended to a whole new level of species - ie mutated
John - I was talking to my mate Mark last night and he had this small problem with his computer
Steve - what was it
John - He couldn’t turn it on, he’s such a mutant fuck!
Steve - what was it
John - He couldn’t turn it on, he’s such a mutant fuck!