(1)A blend of the word terrific with reference to a sexually transmissable infection. (2)An adjective insulting something, generally of a sexual or biological nature, that is extremely unpleasant or malformed. (3)Used in conjunction with heavy sarcasm and often raised (in consternation)eyebrows.
First recorded use in summer 2004 in British Columbia.
"So how do you like my piercing? The swelling should go down in a few weeks."
"Wow dude, it's just gonnorhific!"