proper banginis a phrase used by an idiotic species called chavs.
chavs have the IQ of a retarded chimp baby and seemingly have not fully evolved into humans.
They have their own strange accent that no other living creature on earth understands.
chavs use the phrase "proper bangin" to mean very good.
Chav: Oi! Look at me mental fake gold ring me got from da 20p machine down at Mcdonalds like!
2nd Chav: Whoa bruv dat shit is proper bangin like!