Yobbos is a slang term used to describe rude and aggressive youths. It is derived from the Australian English word 'YOBBO', which was originally used to describe an uncouth, boorish person. Yobbos are typically young people who display anti-social behaviour, such as vandalism, public drunkenness, and verbal abuse. They are often seen as a nuisance in public places and can be a source of disruption and fear for other members of the community.