LMBO Joke from a 60s Book. Seriously!

I recently finished reading The Outsiders by S.E. Hinton, and I just remembered this BOSS joke from it:
"You should see Sandy's brother. Now there's a hood. He's so greasy he glides when he walks. He goes to the barber for an oil change not hair cut." Mwahahahahaha! Now here's some background info: their gang is called the greasers, and so he means he's such a big greaser when he says 'greasy'.