the combination of the words 'possible' and 'immpossible'. It was first coined on the CBS series How I Met Your Mother by Barney Stinson, played by Neil Patrick Harris.
Barney - "Some poeple do what is possible, but I go past the possible."
Interviewer - "You mean the impossible?"
Barney - "No, I do what is possible and impossible combined: the possimpable."