What I find hilarious about Osborn hair is that it's become its own reference. It's pretty clear that almost all modern artists who draw Osborn hair have no idea what the real life hairstyle is and are just copying earlier artistic renditions of Osborn hair.

(For those wondering, it's what happens when someone with extremely curly hair slicks their hair back in that old-fashioned 40's/50's kinda way. As seen here. Alternately, this!)