Colloquial term used to define emo kids or any half goth half skater youngster talking about pain/suffering/pointlessness of existence etc. The definition also refers to the extra tight black/blue jeans worn by these emu's which are similar to the legs of an emu. The term emu is usually utilized by the elderly trying to complain about some new trend or another hanging in the bus stop with 2 liters of frosty jacks/white lightning cider
"Mavis look at those gosh darned hoodlums getting drunk in the bus station again, i hate these little emu kids. where are the parents these days ... smoking crack with lines of ket. oh dear oh dear ... when i was a boy never did see the like of these emu's" .. etc etc.