The area code was featured, in a somewhat derogatory manner, in the movies Go and Swingers.
People (likely due to its use in Go), will sometimes use it to refer to someone going apeshit.
-Filled with drama, fine girls, money,sunshine, fights, crooked cops, the best OG Kush, pornstars.
Person:"Dam what a fucked up place.Im gonna have to come down to the 818 this summer, sounds dope."
And by the way, I reside in Woodland Hills, Los Angeles, and the are fucking dangerous places to be at night.