Best definition
A wojno usually assumes the form of a hair-gelling pretty-boy but can also be described as an overzealous, pompous, or

vexatious asshole with a limited vocabulary. Wojnos have no tact or sense of practical social behavior. Most recede into an asexual lifestyle after swearing off any form of fun and all the people who have cared about them wish upon them a Mortal Kombat fatality.

-Wow, he said that? ::disgusted face::

-Yeah, he’s such a Wojno