Nabu

The Most Beautiful Girl in the WOLRd...she brightens my day...she is awesome...awesome..and she is an amazing person...I fucking love her, she is...amazing...she is simply breathtaking

A more derogatory version of the term newbie. Not only are they calling you a new player, or a noob, they are also insulting your skills, ad how terrible you are at the situation, game, activity, and literally anything. Although, it could be used in a friendly way. Your friend might call you a Nabu jokingly.