Definition of stalkerazzi in US English:
 stalkerazzi
plural nounˌstôkəˈrätsēˌstôkəˈrätsē
informal Photojournalists who follow celebrities closely and persistently with the intention of obtaining sensational pictures.
 Example sentencesExamples
-  I think it's disgusting that they've done everything - the stalkerazzi have done everything possible to try and ruin their relationship.
 -  Brad Cafarelli, a Cameron Diaz representative, has said this of pictures: ‘This is a case of a tabloid colliding with the stalkerazzi in an attempt to distort the truth and mislead the public.’
 -  The stalkerazzi, as I fondly like to call them wouldn't leave me alone.
 -  "It's about time somebody had the guts to take on one of these stalkerazzis," said Sunshine.
 -  Oxford has noted several new formations such as videorazzi, stalkerazzi, and snapperazzi which have joined the already well-established paparazzi.
 
Origin
  
From stalker + -azzi, on the pattern of paparazzi.