The string you provided appears to be a standardized file naming convention

: These sites typically host pirated content, which may be illegal to download depending on your region. Malware Risk

Based on standard digital media tagging, here is what each part of that subject line represents: : This is likely the Movie Title or an abbreviation for it. Release Year of the film. Www.HDKing.Bike Source Website or the group that "ripped" (encoded) the file. Resolution (High Definition, but lower than 1080p). Video Codec

Files from unofficial distribution sites like "HDKing.Bike" often come with risks: Copyright Issues