The proper deffenition of greb.
Females and males look much the same, both wear black or red, have long black hair or some other wierdo colour.
Both sex's wear make up. They all clame to be depressed when theier lives are fine and they have nothing to be depressed about.
Grebs obviously don't have any fashion sence or don't look in mirrors.
greb : ergh my life sucks my parents keep giving me money.
Passing chav : look at that sad greb mother fucker, needs to shop in a proper shop not where ever the hell they shop.