A variation of the blowjob in which the woman (or man, not that there's anything wrong with that) giving the blowjob has poprocks in their mouth.
Jeff: "Lily gave me a little surprise when in the middle of the blowjob my dick started popping"
Nick: "Well, Jeff, thats called a fizzjob"
Nick: "Well, Jeff, thats called a fizzjob"
by Jeff Sands, Nick Mavro, Lily Pollard December 29, 2006