Originated by the IRAK graff crew/clothing line from new york; Derel is short for derelict, or someone thrown away by society. To these new york graff writers everyone is derel, anyone worth knowing anyway. The word can be found on IRAK tshirts, hats and tags all over NY.
Yo, Kunle and his boys are all derels, they steal and write graffiti all day.
A homeless person or one that looks homeless; derived from the word derelict.
I was waiting for the BART this morning on my way to work and 2 derels and a legit derel asked me for money. Hella busted, man.