The spelling you are looking for is "vein" describing style or a distinctive element or maybe a line of thought or action. The word "vein" that you are looking for in your sentence is a noun. The...
Vain - Excessively proud of one's appearance or accomplishments; conceited.
http://education.yahoo.com/reference/dictionary/entry/vain
It could mean 'your so fine'. But that's just what someone...