[kiririku] (n) (col) (See キリ番, リクエスト) lucky-number request (the person who is the Nth visitor to a web site gets to make a request, e.g. for a custom drawing, where N is a special number like 10000)
[キリばん(キリ番);きりばん(切り番), kiri ban ( kiri ban ); kiriban ( kiri ban )] (n) good turning point number (10000, 12345 etc., often referring to web site visit counts)