Used to describe someone who makes poor decisions, or is just overall to be considered as a bit of a dumb cunt, however does not realise this themselves.
Derived from the essential classes at school that help ‘special children’ and the term ‘butty’.
Similar use to the word ‘retard’.
Robbo: James thinks he’s getting in with Grace
Ron: What an Essential Butty
Robbo: Such an Essential Butty, kid also got a D- on his test
Ron: Such an Essential Butty