Annoying, pointless, sucky, bothersome, stupid etc. Used to show dislike. Often used as an exclamation.
(At the shopping center)
Sarah: The jeans I bought last week for $80 are on special for $40 this week!
Louise: Omg that is so dubs!
Mum: Don't forget to wash the dishes, fold the clothes, vacuum the house, feed the cat, clean the toilet and do your homework.
Oscar: But I have to go to this concert! ARGH mum you can be so dubs sometimes!