Someone who is abit backwards can also be know as a dapper or a todger, usually has some sort of significant learning difficulties.
Appearances are usually - a smart side parting, thick glasses, and more often than not, a budget pair of trainers with the shoelaces overtightened, to the point where the lace holes almost meet. Davey dapper!!!
When beckoned, a run-of-the-mill davey will almost certainly stick their tongue into the inner part of the lower lip,and have the facial expression of someone who has just woken up and then looks upto the sky and then behind, everywhere except where the beckoner is calling for Davey!
Look at Davey over there, if his shoes were any tighter, he could get a blood clot and his feet fall off! Oi Davey..................eerrrr?