(slang, hyperbolic) An unspecified large number (of).
2000 November 14, Dennis [username], βRe: Arrow Web Server is Down!β, in rec.roller-coasterβ[1] (Usenet):
You're better off waiting anyway, the pics I saw weren't that detailed as to what the darn thing did, but I got the idea and I wasn't about to download a killion pics to find out anymore.