An insult mainly used in northern Chicago to describe anything slow, ugly, obese, hopeless and/or lame. Originated from the Australian word for idiot- Dill, put in front of the word Dillon (note: the word is never spelled Dylan, always spelled Dillon)
"Ugh, sorry, my comp is being a dill
"big ol' Dill Dillon
over there thinks he's popular, really, he's the 60 year old virgin in disguise"