A "TOP" release means the encoder compared multiple Web-DLs (from different countries or services) and selected the one with the:

Fast & Furious (2009) — the fourth film in the franchise often called Fast & Furious (also stylized Fast & Furious or Fast & Furious 4) — returned to the series’ street-racing roots with Dominic Toretto (Vin Diesel) and Brian O’Conner (Paul Walker) reuniting against a backdrop of revenge, fuel-smuggling, and high-speed chases. For cinephiles and home-video collectors, terms like “open matte,” “1080p,” and “WEB-D” are important for understanding how a particular release will look and where it came from. This post explains those terms, what they mean for viewers, and why a specific 2009 WEB-D open-matte 1080p file might interest (or disappoint) you.